Warfarin

Warfarin is used to prevent blood clots from forming or growing larger in your blood and blood vessels. It is prescribed for people with certain types of irregular heartbeat, people with prosthetic (replacement or mechanical) heart valves, and people who have suffered a heart attack. Warfarin is also used to treat or prevent venous thrombosis (swelling and blood clot in a vein) and pulmonary embolism (a blood clot in the lung). Warfarin is in a class of medications called anticoagulants ('blood thinners'). It works by decreasing the clotting ability of the blood.

Warfarin comes as a tablet to take by mouth. It is usually taken once a day with or without food. Take warfarin at around the same time every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take warfarin exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor. Call your doctor immediately if you take more than your prescribed dose of warfarin.

Your doctor will probably start you on a low dose of warfarin and gradually increase or decrease your dose based on the results of your blood tests. Make sure you understand any new dosing instructions from your doctor.

Continue to take warfarin even if you feel well. Do not stop taking warfarin without talking to your doctor.

This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.

Before taking warfarin,

• tell your doctor and pharmacist if you are allergic to warfarin, any other medications, or any of the ingredients in warfarin tablets. Ask your pharmacist or check the Medication Guide for a list of the ingredients.

• do not take two or more medications that contain warfarin at the same time. Be sure to check with your doctor or pharmacist if you are uncertain if a medication contains warfarin or warfarin sodium.

• tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, and nutritional supplements you are taking or plan to take, especially acyclovir (Zovirax); allopurinol (Zyloprim); alprazolam (Xanax); antibiotics such as ciprofloxacin (Cipro), clarithromycin (Biaxin, in Prevpac), erythromycin (E.E.S., Eryc, Ery-Tab), nafcillin, norfloxacin (Noroxin), sulfinpyrazone, telithromycin (Ketek), and tigecycline (Tygacil); anticoagulants such as argatroban (Acova), dabigatran (Pradaxa), bivalirudin (Angiomax), desirudin (Iprivask), heparin, and lepirudin (Refludan); antifungals such as fluconazole (Diflucan), itraconazole (Onmel, Sporanox), ketoconazole (Nizoral), miconazole (Monistat), posaconazole (Noxafil), terbinafine (Lamisil), voriconazole (Vfend); antiplatelet medications such as cilostazol (Pletal), clopidogrel (Plavix), dipyridamole (Persantine, in Aggrenox), prasugrel (Effient), and ticlopidine (Ticlid); aprepitant (Emend); aspirin or aspirin-containing products and other nonsteroidal anti-inflammatory drugs such as celecoxib (Celebrex), diclofenac (Flector, Voltaren, in Arthrotec), diflunisal, fenoprofen (Nalfon), ibuprofen (Advil, Motrin), indomethacin (Indocin), ketoprofen, ketorolac, mefenamic acid (Ponstel), naproxen (Aleve, Naprosyn), oxaprozin (Daypro), piroxicam (Feldene), and sulindac (Clinoril); bicalutamide; bosentan; certain antiarrhythmic medications such as amiodarone (Cordarone, Nexterone, Pacerone), mexiletine, and propafenone (Rythmol); certain calcium channel blocking medications such as amlodipine (Norvasc, in Azor, Caduet, Exforge, Lotrel, Twynsta), diltiazem (Cardizem, Cartia XT, Dilacor XR, Tiazac) and verapamil (Calan, Isoptin, Verelan, in Tarka); certain medications for asthma such as montelukast (Singulair), zafirlukast (Accolate), and zileuton (Zyflo); certain medications used to treat cancer such as capecitabine (Xeloda), imatinib (Gleevec), and nilotinib (Tasigna); certain medications for cholesterol such as atorvastatin (Lipitor, in Caduet) and fluvastatin (Lescol); certain medications for digestive disorders such as cimetidine (Tagamet), famotidine (Pepcid), and ranitidine (Zantac); certain medications for human immunodeficiency virus (HIV) infection such as amprenavir, atazanavir (Reyataz), efavirenz (Sustiva), etravirine (Intelence), fosamprenavir (Lexiva), indinavir (Crixivan), lopinavir/ritonavir, nelfinavir (Viracept), ritonavir (Norvir), saquinavir (Invirase), and tipranavir (Aptivus); certain medications for narcolepsy such as armodafinil (Nuvigil) and modafinil (Provigil); certain medications for seizures such as carbamazepine (Carbatrol, Equetro, Tegretol), phenobarbital, phenytoin (Dilantin, Phenytek), and rufinamide (Banzel); certain medications to treat tuberculosis such as isoniazid (in Rifamate, Rifater) and rifampin (Rifadin, in Rifamate, Rifater); certain selective serotonin reuptake inhibitors (SSRIs) or selective serotonin and norepinephrine reuptake inhibitors (SNRIs) such as citalopram (Celexa), desvenlafaxine (Pristiq), duloxetine (Cymbalta), escitalopram (Lexapro), fluoxetine (Prozac, Sarafem, in Symbyax), fluvoxamine (Luvox), milnacipran (Savella), paroxetine (Paxil, Pexeva), sertraline (Zoloft), venlafaxine (Effexor) corticosteroids such as prednisone; cyclosporine (Neoral, Sandimmune); disulfiram (Antabuse); methoxsalen (Oxsoralen, Uvadex); metronidazole (Flagyl); nefazodone (Serzone), oral contraceptives (birth control pills); oxandrolone (Oxandrin); pioglitazone (Actos, in Actoplus Met, Duetact, Oseni); propranolol (Inderal) or vilazodone (Viibryd). Many other medications may also interact with warfarin, so be sure to tell your doctor about all the medications you are taking, even those that do not appear on this list. Do not take any new medications or stop taking any medication without talking to your doctor.

• tell your doctor and pharmacist what herbal or botanical products you are taking, especially coenzyme Q10 (Ubidecarenone), Echinacea, garlic, Ginkgo biloba, ginseng, goldenseal, and St. John's wort. There are many other herbal or botanical products which might affect your body's response to warfarin. Do not start or stop taking any herbal products without talking to your doctor.

• tell your doctor if you have or have ever had diabetes. Also tell your doctor if you have an infection, a gastrointestinal illness such as diarrhea, or sprue (an allergic reaction to protein found in grains that causes diarrhea), or an indwelling catheter (a flexible plastic tube that is placed into the bladder to allow the urine to drain out).

• Tell your doctor if you are pregnant, think you might be pregnant, or plan to become pregnant while taking warfarin. Pregnant women should not take warfarin unless they have a mechanical heart valve. Talk to your doctor about the use of effective birth control while taking warfarin. If you become pregnant while taking warfarin, call your doctor immediately. Warfarin may harm the fetus.

• tell your doctor if you are breast-feeding.

• if you are having surgery, including dental surgery, or any type of medical or dental procedure, tell the doctor or dentist that you are taking warfarin. Your doctor may tell you to stop taking warfarin before the surgery or procedure or change your dosage of warfarin before the surgery or procedure. Follow your doctor's directions carefully and keep all appointments with the laboratory if your doctor orders blood tests to find the best dose of warfarin for you.

• ask your doctor about the safe use of alcoholic beverages while you are taking warfarin.

• tell your doctor if you use tobacco products. Cigarette smoking may decrease the effectiveness of this medication.

Eat a normal, healthy diet. Some foods and beverages, particularly those that contain vitamin K, can affect how warfarin works for you. Ask your doctor or pharmacist for a list of foods that contain vitamin K. Eat consistent amounts of vitamin K-containing food on a week-to-week basis. Do not eat large amounts of leafy, green vegetables or certain vegetable oils that contain large amounts of vitamin K. Be sure to talk to your doctor before you make any changes in your diet. Talk to your doctor about eating grapefruit and drinking grapefruit juice while taking this medication.

Take the missed dose as soon as you remember it, if it is the same day that you were to take the dose. Do not take a double dose the next day to make up for a missed one. Call your doctor if you miss a dose of warfarin.

• Warfarin may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

  • gas

  • abdominal pain

  • bloating

  • change in the way things taste

  • loss of hair

  • feeling cold or having chills

• If you experience any of the following symptoms, or those listed in the IMPORTANT WARNING section, call your doctor immediately:

  • hives

  • rash

  • itching

  • difficulty breathing or swallowing

  • swelling of the face, throat, tongue, lips, or eyes

  • hoarseness

  • chest pain or pressure

  • swelling of the hands, feet, ankles, or lower legs

  • fever

  • infection

  • nausea

  • vomiting

  • diarrhea

  • extreme tiredness

  • lack of energy

  • loss of appetite

  • pain in the upper right part of the stomach

  • yellowing of the skin or eyes

  • flu-like symptoms

• You should know that warfarin may cause necrosis or gangrene (death of skin or other body tissues). Call your doctor immediately if you notice a purplish or darkened color to your skin, skin changes, ulcers, or an unusual problem in any area of your skin or body, or if you have a severe pain that occurs suddenly, or color or temperature change in any area of your body. Call your doctor immediately if your toes become painful or become purple or dark in color. You may need medical care right away to prevent amputation (removal) of your affected body part.

• Warfarin may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.

Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat, moisture (not in the bathroom), and light.

Unneeded medications should be disposed of in special ways to ensure that pets, children, and other people cannot consume them. However, you should not flush this medication down the toilet. Instead, the best way to dispose of your medication is through a medicine take-back program. Talk to your pharmacist or contact your local garbage/recycling department to learn about take-back programs in your community. See the FDA's Safe Disposal of Medicines website (http://goo.gl/c4Rm4p) for more information if you do not have access to a take-back program.

It is important to keep all medication out of sight and reach of children as many containers (such as weekly pill minders and those for eye drops, creams, patches, and inhalers) are not child-resistant and young children can open them easily. To protect young children from poisoning, always lock safety caps and immediately place the medication in a safe location – one that is up and away and out of their sight and reach. http://www.upandaway.org

In case of overdose, call the poison control helpline at 1-800-222-1222. Information is also available online at https://www.poisonhelp.org/help. If the victim has collapsed, had a seizure, has trouble breathing, or can't be awakened, immediately call emergency services at 911.

Symptoms of overdose may include the following:

• bloody or red, or tarry bowel movements

• spitting or coughing up blood

• heavy bleeding with your menstrual period

• pink, red, or dark brown urine

• coughing up or vomiting material that looks like coffee grounds

• small, flat, round red spots under the skin

• unusual bruising or bleeding

• continued oozing or bleeding from minor cuts

Carry an identification card or wear a bracelet stating that you take warfarin. Ask your pharmacist or doctor how to obtain this card or bracelet. List your name, medical problems, medications and dosages, and doctor's name and telephone number on the card.

Tell all your healthcare providers that you take warfarin.

Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.

It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.

Drug	Interaction
Moxifloxacin	Moxifloxacin The therapeutic efficacy of Warfarin can be increased when used in combination with Moxifloxacin.
Repaglinide	Repaglinide The metabolism of Repaglinide can be decreased when combined with Warfarin.
Montelukast	Montelukast The metabolism of Warfarin can be decreased when combined with Montelukast.
Insulin Glargine (rDNA origin) Injection	Insulin Glargine (rDNA origin) Injection The metabolism of Warfarin can be increased when combined with Insulin glargine.
Leflunomide	Leflunomide The serum concentration of Warfarin can be decreased when it is combined with Leflunomide.
Delavirdine	Delavirdine The serum concentration of Warfarin can be increased when it is combined with Delavirdine.
Nevirapine	Nevirapine The metabolism of Nevirapine can be decreased when combined with Warfarin.
Atorvastatin	Atorvastatin The metabolism of Warfarin can be decreased when combined with Atorvastatin.
Dolasetron	Dolasetron The risk or severity of adverse effects can be increased when Dolasetron is combined with Warfarin.
Aminophylline	Aminophylline The metabolism of Aminophylline can be increased when combined with Warfarin.
Anagrelide	Anagrelide The risk or severity of bleeding can be increased when Anagrelide is combined with Warfarin.
Calcium Carbonate	Calcium Carbonate The therapeutic efficacy of Calcium carbonate can be decreased when used in combination with Warfarin.
Candesartan	Candesartan The metabolism of Candesartan can be decreased when combined with Warfarin.
Cilostazol	Cilostazol The serum concentration of Cilostazol can be increased when it is combined with Warfarin.
Clopidogrel	Clopidogrel The risk or severity of bleeding can be increased when Clopidogrel is combined with Warfarin.
Erythromycin and Sulfisoxazole	Erythromycin and Sulfisoxazole The risk or severity of bleeding can be increased when Erythromycin is combined with Warfarin.
Estrogen and Progestin (Oral Contraceptives)	Estrogen and Progestin (Oral Contraceptives) The metabolism of Warfarin can be decreased when combined with Conjugated estrogens.
Fenofibrate	Fenofibrate The metabolism of Warfarin can be decreased when combined with Fenofibrate.
Guanfacine	Guanfacine Warfarin may decrease the excretion rate of Guanfacine which could result in a higher serum level.
Magnesium Hydroxide	Magnesium Hydroxide Magnesium hydroxide may decrease the excretion rate of Warfarin which could result in a higher serum level.
Methylergonovine	Methylergonovine The serum concentration of Warfarin can be increased when it is combined with Methylergometrine.
Mycophenolate	Mycophenolate Mycophenolic acid may decrease the excretion rate of Warfarin which could result in a higher serum level.
Naratriptan	Naratriptan The risk or severity of adverse effects can be increased when Naratriptan is combined with Warfarin.
Olsalazine	Olsalazine The risk or severity of bleeding and hemorrhage can be increased when Olsalazine is combined with Warfarin.
Paregoric	Paregoric The metabolism of Morphine can be decreased when combined with Warfarin.
Potassium	Potassium Warfarin may decrease the excretion rate of Potassium cation which could result in a higher serum level.
Prednisone	Prednisone Prednisone may increase the anticoagulant activities of Warfarin.
Ranitidine	Ranitidine The serum concentration of Warfarin can be increased when it is combined with Ranitidine.
Reserpine	Reserpine Reserpine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Rizatriptan	Rizatriptan Rizatriptan may decrease the excretion rate of Warfarin which could result in a higher serum level.
Sumatriptan	Sumatriptan Sumatriptan may decrease the excretion rate of Warfarin which could result in a higher serum level.
Tacrolimus	Tacrolimus The serum concentration of Warfarin can be increased when it is combined with Tacrolimus.
Tizanidine	Tizanidine The metabolism of Tizanidine can be decreased when combined with Warfarin.
Triamcinolone	Triamcinolone The therapeutic efficacy of Warfarin can be decreased when used in combination with Triamcinolone.
Zolmitriptan	Zolmitriptan The metabolism of Warfarin can be decreased when combined with Zolmitriptan.
Ampicillin Injection	Ampicillin Injection Ampicillin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Doxycycline Injection	Doxycycline Injection The risk or severity of bleeding can be increased when Doxycycline is combined with Warfarin.
Famotidine Injection	Famotidine Injection The metabolism of Warfarin can be decreased when combined with Famotidine.
Fluconazole Injection	Fluconazole Injection The therapeutic efficacy of Warfarin can be increased when used in combination with Fluconazole.
Foscarnet Injection	Foscarnet Injection Foscarnet may decrease the excretion rate of Warfarin which could result in a higher serum level.
Hydromorphone Injection	Hydromorphone Injection The metabolism of Hydromorphone can be decreased when combined with Warfarin.
Interferon Beta-1b Injection	Interferon Beta-1b Injection The metabolism of Warfarin can be decreased when combined with Interferon beta-1b.
Interferon Gamma-1b Injection	Interferon Gamma-1b Injection The metabolism of Warfarin can be decreased when combined with Interferon gamma-1b.
Levofloxacin Injection	Levofloxacin Injection The therapeutic efficacy of Warfarin can be increased when used in combination with Levofloxacin.
Meperidine Injection	Meperidine Injection The metabolism of Warfarin can be increased when combined with Meperidine.
Methylprednisolone Injection	Methylprednisolone Injection The metabolism of Warfarin can be increased when combined with Methylprednisolone.
Metoclopramide Injection	Metoclopramide Injection Warfarin may decrease the excretion rate of Metoclopramide which could result in a higher serum level.
Metronidazole Injection	Metronidazole Injection The serum concentration of Warfarin can be increased when it is combined with Metronidazole.
Morphine Injection	Morphine Injection The metabolism of Morphine can be decreased when combined with Warfarin.
Pamidronate Injection	Pamidronate Injection Pamidronic acid may decrease the excretion rate of Warfarin which could result in a higher serum level.
Vancomycin Injection	Vancomycin Injection Vancomycin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Zidovudine Injection	Zidovudine Injection The metabolism of Zidovudine can be decreased when combined with Warfarin.
Altretamine	Altretamine Amphetamine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Cefuroxime	Cefuroxime Cefuroxime may decrease the excretion rate of Warfarin which could result in a higher serum level.
Cyclosporine	Cyclosporine The serum concentration of Warfarin can be increased when it is combined with Cyclosporine.
Ondansetron	Ondansetron The metabolism of Warfarin can be decreased when combined with Ondansetron.
Enoxaparin Injection	Enoxaparin Injection The risk or severity of bleeding can be increased when Warfarin is combined with Enoxaparin.
Granisetron	Granisetron The risk or severity of adverse effects can be increased when Granisetron is combined with Warfarin.
Alosetron	Alosetron The metabolism of Alosetron can be decreased when combined with Warfarin.
Dofetilide	Dofetilide The metabolism of Dofetilide can be increased when combined with Warfarin.
Hydroxychloroquine	Hydroxychloroquine The metabolism of Hydroxychloroquine can be decreased when combined with Warfarin.
Meloxicam	Meloxicam The risk or severity of bleeding can be increased when Meloxicam is combined with Warfarin.
Orlistat	Orlistat Orlistat may increase the anticoagulant activities of Warfarin.
Oxcarbazepine	Oxcarbazepine The metabolism of Warfarin can be increased when combined with Oxcarbazepine.
Pantoprazole	Pantoprazole Warfarin may decrease the excretion rate of Pantoprazole which could result in a higher serum level.
Sevelamer	Sevelamer Sevelamer can cause a decrease in the absorption of Warfarin resulting in a reduced serum concentration and potentially a decrease in efficacy.
Temozolomide	Temozolomide Warfarin may decrease the excretion rate of Temozolomide which could result in a higher serum level.
Zaleplon	Zaleplon Warfarin may decrease the excretion rate of Zaleplon which could result in a higher serum level.
Anakinra	Anakinra The metabolism of Warfarin can be increased when combined with Anakinra.
Linezolid	Linezolid The risk or severity of bleeding and hemorrhage can be increased when Linezolid is combined with Warfarin.
Pentosan Polysulfate	Pentosan Polysulfate Pentosan polysulfate may increase the anticoagulant activities of Warfarin.
Trimipramine	Trimipramine The metabolism of Warfarin can be decreased when combined with Trimipramine.
Etanercept Injection	Etanercept Injection The metabolism of Warfarin can be increased when combined with Etanercept.
Modafinil	Modafinil The metabolism of Warfarin can be increased when combined with Modafinil.
Perindopril	Perindopril Perindopril may decrease the excretion rate of Warfarin which could result in a higher serum level.
Tenofovir	Tenofovir Tenofovir may decrease the excretion rate of Warfarin which could result in a higher serum level.
Choline Magnesium Trisalicylate	Choline Magnesium Trisalicylate The risk or severity of bleeding and hemorrhage can be increased when Choline magnesium trisalicylate is combined with Warfarin.
Sirolimus	Sirolimus The therapeutic efficacy of Warfarin can be increased when used in combination with Sirolimus.
Epinephrine Injection	Epinephrine Injection The serum concentration of Warfarin can be increased when it is combined with Epinephrine.
Epirubicin	Epirubicin The risk or severity of bleeding can be increased when Warfarin is combined with Epirubicin.
Eplerenone	Eplerenone Eplerenone may increase the excretion rate of Warfarin which could result in a lower serum level and potentially a reduction in efficacy.
Escitalopram	Escitalopram The risk or severity of bleeding can be increased when Escitalopram is combined with Warfarin.
Zonisamide	Zonisamide Warfarin may decrease the excretion rate of Zonisamide which could result in a higher serum level.
Adalimumab Injection	Adalimumab Injection The serum concentration of Warfarin can be decreased when it is combined with Adalimumab.
Aripiprazole	Aripiprazole The metabolism of Warfarin can be increased when combined with Aripiprazole.
Atomoxetine	Atomoxetine Atomoxetine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Dexmethylphenidate	Dexmethylphenidate The serum concentration of the active metabolites of Warfarin can be increased when Warfarin is used in combination with Dexmethylphenidate.
Atazanavir	Atazanavir The serum concentration of Warfarin can be increased when it is combined with Atazanavir.
Almotriptan	Almotriptan Warfarin may decrease the excretion rate of Almotriptan which could result in a higher serum level.
Eletriptan	Eletriptan The metabolism of Warfarin can be decreased when combined with Eletriptan.
Mefloquine	Mefloquine The serum concentration of Warfarin can be increased when it is combined with Mefloquine.
Rosuvastatin	Rosuvastatin The metabolism of Warfarin can be decreased when combined with Rosuvastatin.
Aprepitant	Aprepitant The serum concentration of Warfarin can be increased when it is combined with Aprepitant.
Emtricitabine	Emtricitabine Warfarin may decrease the excretion rate of Emtricitabine which could result in a higher serum level.
Interferon Beta-1a Subcutaneous Injection	Interferon Beta-1a Subcutaneous Injection The metabolism of Warfarin can be decreased when combined with Interferon beta-1a.
Memantine	Memantine Warfarin may decrease the excretion rate of Memantine which could result in a higher serum level.
Tegaserod	Tegaserod The metabolism of Warfarin can be decreased when combined with Tegaserod.
Tadalafil	Tadalafil Tadalafil may decrease the excretion rate of Warfarin which could result in a higher serum level.
Fosamprenavir	Fosamprenavir The serum concentration of Warfarin can be increased when it is combined with Fosamprenavir.
Frovatriptan	Frovatriptan The metabolism of Frovatriptan can be decreased when combined with Warfarin.
Gemifloxacin	Gemifloxacin The therapeutic efficacy of Warfarin can be increased when used in combination with Gemifloxacin.
Progesterone	Progesterone The metabolism of Warfarin can be increased when combined with Progesterone.
Apomorphine Injection	Apomorphine Injection The metabolism of Warfarin can be decreased when combined with Apomorphine.
Infliximab Injection	Infliximab Injection The metabolism of Warfarin can be increased when combined with Infliximab.
Oxandrolone	Oxandrolone The metabolism of Warfarin can be decreased when combined with Oxandrolone.
Protriptyline	Protriptyline The risk or severity of adverse effects can be increased when Protriptyline is combined with Warfarin.
Rifaximin	Rifaximin The metabolism of Warfarin can be increased when combined with Rifaximin.
Duloxetine	Duloxetine The serum concentration of Warfarin can be increased when it is combined with Duloxetine.
Norethindrone	Norethindrone The metabolism of Warfarin can be decreased when combined with Norethisterone.
Tinidazole	Tinidazole Tinidazole may decrease the excretion rate of Warfarin which could result in a higher serum level.
Bosentan	Bosentan The metabolism of Warfarin can be increased when combined with Bosentan.
Cefditoren	Cefditoren Cefdinir may decrease the excretion rate of Warfarin which could result in a higher serum level.
Cinacalcet	Cinacalcet The metabolism of Cinacalcet can be decreased when combined with Warfarin.
Cyanocobalamin Injection	Cyanocobalamin Injection Hydroxocobalamin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Erlotinib	Erlotinib The serum concentration of Warfarin can be increased when it is combined with Erlotinib.
Eszopiclone	Eszopiclone The serum concentration of Warfarin can be decreased when it is combined with Eszopiclone.
Ganciclovir	Ganciclovir Ganciclovir may decrease the excretion rate of Warfarin which could result in a higher serum level.
Ribavirin	Ribavirin Ribavirin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Valganciclovir	Valganciclovir Valganciclovir may decrease the excretion rate of Warfarin which could result in a higher serum level.
Voriconazole	Voriconazole The serum concentration of Warfarin can be increased when it is combined with Voriconazole.
Adefovir	Adefovir Adefovir may decrease the excretion rate of Warfarin which could result in a higher serum level.
Dextroamphetamine	Dextroamphetamine Amphetamine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Entecavir	Entecavir The metabolism of Warfarin can be decreased when combined with Entecavir.
Peginterferon Alfa-2a Injection	Peginterferon Alfa-2a Injection The metabolism of Warfarin can be decreased when combined with Peginterferon alfa-2a.
Peginterferon Alfa-2b (PEG-Intron)	Peginterferon Alfa-2b (PEG-Intron) The serum concentration of Warfarin can be increased when it is combined with Peginterferon alfa-2b.
Exenatide Injection	Exenatide Injection Exenatide can cause an increase in the absorption of Warfarin resulting in an increased serum concentration and potentially a worsening of adverse effects.
Isocarboxazid	Isocarboxazid The risk or severity of bleeding and hemorrhage can be increased when Isocarboxazid is combined with Warfarin.
Ramelteon	Ramelteon The metabolism of Ramelteon can be decreased when combined with Warfarin.
Fentanyl	Fentanyl Fentanyl may decrease the excretion rate of Warfarin which could result in a higher serum level.
Pregabalin	Pregabalin Pregabalin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Deferasirox	Deferasirox The risk or severity of gastrointestinal bleeding can be increased when Warfarin is combined with Deferasirox.
Phenylephrine	Phenylephrine The metabolism of Warfarin can be increased when combined with Phenylephrine.
Tipranavir	Tipranavir The risk or severity of bleeding and hemorrhage can be increased when Tipranavir is combined with Warfarin.
Felbamate	Felbamate The metabolism of Warfarin can be increased when combined with Felbamate.
Ranolazine	Ranolazine The metabolism of Ranolazine can be increased when combined with Warfarin.
Abatacept Injection	Abatacept Injection The metabolism of Warfarin can be increased when combined with Abatacept.
Rasagiline	Rasagiline Rasagiline may decrease the excretion rate of Warfarin which could result in a higher serum level.
Imatinib	Imatinib Imatinib may increase the anticoagulant activities of Warfarin.
Sitagliptin	Sitagliptin Warfarin may decrease the excretion rate of Sitagliptin which could result in a higher serum level.
Varenicline	Varenicline Varenicline may decrease the excretion rate of Warfarin which could result in a higher serum level.
Gefitinib	Gefitinib Gefitinib may increase the anticoagulant activities of Warfarin.
Albuterol	Albuterol Warfarin may decrease the excretion rate of Salbutamol which could result in a higher serum level.
Paliperidone	Paliperidone Paliperidone may decrease the excretion rate of Warfarin which could result in a higher serum level.
Bortezomib	Bortezomib The metabolism of Warfarin can be increased when combined with Bortezomib.
Clofarabine Injection	Clofarabine Injection Clofarabine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Insulin Glulisine (rDNA origin) Injection	Insulin Glulisine (rDNA origin) Injection The metabolism of Warfarin can be increased when combined with Insulin glulisine.
Lubiprostone	Lubiprostone Lubiprostone may decrease the excretion rate of Warfarin which could result in a higher serum level.
Oxaliplatin Injection	Oxaliplatin Injection The risk or severity of bleeding can be increased when Warfarin is combined with Oxaliplatin.
Posaconazole	Posaconazole The serum concentration of Warfarin can be increased when it is combined with Posaconazole.
Primaquine	Primaquine The serum concentration of Warfarin can be increased when it is combined with Primaquine.
Rituximab Injection	Rituximab Injection The risk or severity of bleeding can be increased when Warfarin is combined with Rituximab.
Bismuth Subsalicylate	Bismuth Subsalicylate Bismuth subsalicylate may increase the anticoagulant activities of Warfarin.
Darunavir	Darunavir The serum concentration of Warfarin can be increased when it is combined with Darunavir.
Pemetrexed Injection	Pemetrexed Injection Pemetrexed may decrease the excretion rate of Warfarin which could result in a higher serum level.
Nabilone	Nabilone The metabolism of Warfarin can be decreased when combined with Nabilone.
Retapamulin	Retapamulin The metabolism of Retapamulin can be increased when combined with Warfarin.
Vorinostat	Vorinostat Vorinostat may increase the anticoagulant activities of Warfarin.
Sorafenib	Sorafenib Sorafenib may increase the anticoagulant activities of Warfarin.
Sunitinib	Sunitinib The serum concentration of Warfarin can be increased when it is combined with Sunitinib.
Dronabinol	Dronabinol The metabolism of Dronabinol can be decreased when combined with Warfarin.
Lapatinib	Lapatinib The serum concentration of Warfarin can be increased when it is combined with Lapatinib.
Levocetirizine	Levocetirizine Warfarin may decrease the excretion rate of Levocetirizine which could result in a higher serum level.
Pegaptanib Injection	Pegaptanib Injection Pegaptanib may decrease the excretion rate of Warfarin which could result in a higher serum level.
Dasatinib	Dasatinib The risk or severity of bleeding and hemorrhage can be increased when Dasatinib is combined with Warfarin.
Mexiletine	Mexiletine The metabolism of Warfarin can be decreased when combined with Mexiletine.
Omega-3 Fatty Acids	Omega-3 Fatty Acids Omega-3 fatty acids may increase the anticoagulant activities of Warfarin.
Armodafinil	Armodafinil The metabolism of Warfarin can be increased when combined with Armodafinil.
Azacitidine Injection	Azacitidine Injection Azacitidine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Ivermectin	Ivermectin Ivermectin may decrease the anticoagulant activities of Warfarin.
Temsirolimus	Temsirolimus The metabolism of Temsirolimus can be increased when combined with Warfarin.
Nelarabine Injection	Nelarabine Injection The risk or severity of bleeding can be increased when Warfarin is combined with Nelarabine.
Lenalidomide	Lenalidomide Lenalidomide may decrease the excretion rate of Warfarin which could result in a higher serum level.
Nilotinib	Nilotinib The serum concentration of Warfarin can be increased when it is combined with Nilotinib.
Toremifene	Toremifene The risk or severity of bleeding can be increased when Toremifene is combined with Warfarin.
Bexarotene	Bexarotene The metabolism of Warfarin can be increased when combined with Bexarotene.
Budesonide	Budesonide The metabolism of Warfarin can be increased when combined with Budesonide.
Chloramphenicol Injection	Chloramphenicol Injection The serum concentration of Warfarin can be increased when it is combined with Chloramphenicol.
Decitabine Injection	Decitabine Injection The risk or severity of bleeding can be increased when Warfarin is combined with Decitabine.
Desmopressin	Desmopressin Desmopressin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Doripenem Injection	Doripenem Injection Doripenem may decrease the excretion rate of Warfarin which could result in a higher serum level.
Etravirine	Etravirine The metabolism of Warfarin can be increased when combined with Etravirine.
Arsenic Trioxide Injection	Arsenic Trioxide Injection Warfarin may decrease the excretion rate of Arsenic trioxide which could result in a higher serum level.
Mitoxantrone Injection	Mitoxantrone Injection The serum concentration of Warfarin can be increased when it is combined with Mitoxantrone.
Desvenlafaxine	Desvenlafaxine The serum concentration of Warfarin can be increased when it is combined with Desvenlafaxine.
Cevimeline	Cevimeline Cevimeline may decrease the excretion rate of Warfarin which could result in a higher serum level.
Nebivolol	Nebivolol The metabolism of Nebivolol can be decreased when combined with Warfarin.
Tretinoin	Tretinoin The metabolism of Tretinoin can be decreased when combined with Warfarin.
Bendamustine Injection	Bendamustine Injection The metabolism of Bendamustine can be decreased when combined with Warfarin.
Pilocarpine	Pilocarpine The serum concentration of Warfarin can be increased when it is combined with Pilocarpine.
Flecainide	Flecainide The metabolism of Warfarin can be decreased when combined with Flecainide.
Certolizumab Injection	Certolizumab Injection The metabolism of Warfarin can be increased when combined with Certolizumab pegol.
Ixabepilone Injection	Ixabepilone Injection The metabolism of Ixabepilone can be increased when combined with Warfarin.
Irinotecan Injection	Irinotecan Injection The metabolism of Irinotecan can be increased when combined with Warfarin.
Daptomycin Injection	Daptomycin Injection Daptomycin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Praziquantel	Praziquantel The metabolism of Praziquantel can be decreased when combined with Warfarin.
Mitotane	Mitotane The metabolism of Warfarin can be increased when combined with Mitotane.
Methylnaltrexone Injection	Methylnaltrexone Injection Methylnaltrexone may decrease the excretion rate of Warfarin which could result in a higher serum level.
Alemtuzumab Injection (Chronic Lymphocytic Leukemia)	Alemtuzumab Injection (Chronic Lymphocytic Leukemia) The risk or severity of bleeding can be increased when Warfarin is combined with Alemtuzumab.
Rufinamide	Rufinamide The metabolism of Warfarin can be increased when combined with Rufinamide.
Midazolam	Midazolam The serum concentration of Warfarin can be increased when it is combined with Midazolam.
Dexrazoxane Injection	Dexrazoxane Injection Dexrazoxane may decrease the excretion rate of Warfarin which could result in a higher serum level.
Eltrombopag	Eltrombopag The metabolism of Eltrombopag can be decreased when combined with Warfarin.
Ibritumomab Injection	Ibritumomab Injection The risk or severity of adverse effects can be increased when Warfarin is combined with Ibritumomab tiuxetan.
Milnacipran	Milnacipran The serum concentration of Warfarin can be increased when it is combined with Milnacipran.
Dexlansoprazole	Dexlansoprazole The metabolism of Dexlansoprazole can be decreased when combined with Warfarin.
Plerixafor Injection	Plerixafor Injection Plerixafor may decrease the excretion rate of Warfarin which could result in a higher serum level.
Fesoterodine	Fesoterodine Warfarin may decrease the excretion rate of Fesoterodine which could result in a higher serum level.
Betaxolol	Betaxolol The metabolism of Warfarin can be decreased when combined with Betaxolol.
Iloperidone	Iloperidone The risk or severity of adverse effects can be increased when Iloperidone is combined with Warfarin.
Prasugrel	Prasugrel The risk or severity of bleeding can be increased when Prasugrel is combined with Warfarin.
Lacosamide	Lacosamide The metabolism of Warfarin can be decreased when combined with Lacosamide.
Everolimus	Everolimus The serum concentration of Everolimus can be increased when it is combined with Warfarin.
Tolvaptan (low blood sodium)	Tolvaptan (low blood sodium) The metabolism of Warfarin can be increased when combined with Tolvaptan.
Dronedarone	Dronedarone The serum concentration of Warfarin can be increased when it is combined with Dronedarone.
Pralatrexate Injection	Pralatrexate Injection Pralatrexate may decrease the excretion rate of Warfarin which could result in a higher serum level.
Palonosetron Injection	Palonosetron Injection Palonosetron may decrease the excretion rate of Warfarin which could result in a higher serum level.
Saxagliptin	Saxagliptin Warfarin may decrease the excretion rate of Saxagliptin which could result in a higher serum level.
Telavancin Injection	Telavancin Injection Telavancin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Romidepsin Injection	Romidepsin Injection Romidepsin may increase the anticoagulant activities of Warfarin.
Tapentadol	Tapentadol The metabolism of Warfarin can be decreased when combined with Tapentadol.
Topotecan	Topotecan The metabolism of Warfarin can be increased when combined with Topotecan.
Golimumab Injection	Golimumab Injection The metabolism of Warfarin can be increased when combined with Golimumab.
Pazopanib	Pazopanib The serum concentration of Warfarin can be increased when it is combined with Pazopanib.
Asenapine	Asenapine The metabolism of Asenapine can be decreased when combined with Warfarin.
Pitavastatin	Pitavastatin The metabolism of Pitavastatin can be decreased when combined with Warfarin.
Albendazole	Albendazole The metabolism of Warfarin can be decreased when combined with Albendazole.
Ulipristal	Ulipristal The metabolism of Ulipristal can be increased when combined with Warfarin.
Levonorgestrel	Levonorgestrel The metabolism of Levonorgestrel can be increased when combined with Warfarin.
Dabigatran	Dabigatran The risk or severity of bleeding can be increased when Warfarin is combined with Dabigatran.
Tocilizumab Injection	Tocilizumab Injection The metabolism of Warfarin can be increased when combined with Tocilizumab.
Dalfampridine	Dalfampridine Dalfampridine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Eribulin Injection	Eribulin Injection The risk or severity of bleeding can be increased when Warfarin is combined with Eribulin.
Cabazitaxel Injection	Cabazitaxel Injection The metabolism of Cabazitaxel can be increased when combined with Warfarin.
Ceftaroline Injection	Ceftaroline Injection Ceftaroline fosamil may decrease the excretion rate of Warfarin which could result in a higher serum level.
Lurasidone	Lurasidone The risk or severity of adverse effects can be increased when Lurasidone is combined with Warfarin.
Acetaminophen Injection	Acetaminophen Injection The risk or severity of adverse effects can be increased when Acetaminophen is combined with Warfarin.
Vilazodone	Vilazodone The metabolism of Vilazodone can be decreased when combined with Warfarin.
Ipilimumab Injection	Ipilimumab Injection Ipilimumab may decrease the excretion rate of Warfarin which could result in a higher serum level.
Denileukin Diftitox Injection	Denileukin Diftitox Injection The serum concentration of Warfarin can be increased when it is combined with Aldesleukin.
Terbutaline Injection	Terbutaline Injection Terbutaline may decrease the excretion rate of Warfarin which could result in a higher serum level.
Busulfan Injection	Busulfan Injection The metabolism of Busulfan can be increased when combined with Warfarin.
Roflumilast	Roflumilast The metabolism of Warfarin can be decreased when combined with Roflumilast.
Linagliptin	Linagliptin The serum concentration of Warfarin can be increased when it is combined with Linagliptin.
Rilpivirine	Rilpivirine The serum concentration of Warfarin can be increased when it is combined with Rilpivirine.
Telaprevir	Telaprevir The metabolism of Warfarin can be decreased when combined with Glecaprevir.
Fidaxomicin	Fidaxomicin The risk or severity of bleeding can be increased when Fidaxomicin is combined with Warfarin.
Potassium Iodide	Potassium Iodide Potassium Iodide may increase the anticoagulant activities of Warfarin.
Cyclophosphamide Injection	Cyclophosphamide Injection The therapeutic efficacy of Warfarin can be increased when used in combination with Cyclophosphamide.
Abiraterone	Abiraterone The serum concentration of Warfarin can be increased when it is combined with Abiraterone.
Rivaroxaban	Rivaroxaban Warfarin may increase the anticoagulant activities of Rivaroxaban.
Ticagrelor	Ticagrelor The serum concentration of Warfarin can be increased when it is combined with Ticagrelor.
Brentuximab Vedotin Injection	Brentuximab Vedotin Injection The serum concentration of Warfarin can be increased when it is combined with Brentuximab vedotin.
Ruxolitinib	Ruxolitinib The metabolism of Ruxolitinib can be increased when combined with Warfarin.
Vandetanib	Vandetanib The metabolism of Vandetanib can be increased when combined with Warfarin.
Clobazam	Clobazam The metabolism of Clobazam can be increased when combined with Warfarin.
Vemurafenib	Vemurafenib The serum concentration of Warfarin can be increased when it is combined with Vemurafenib.
Vismodegib	Vismodegib The metabolism of Vismodegib can be decreased when combined with Warfarin.
Ivacaftor	Ivacaftor The serum concentration of Warfarin can be increased when it is combined with Ivacaftor.
Deferiprone	Deferiprone Deferiprone may decrease the excretion rate of Warfarin which could result in a higher serum level.
Axitinib	Axitinib The metabolism of Axitinib can be increased when combined with Warfarin.
Crizotinib	Crizotinib The metabolism of Warfarin can be decreased when combined with Crizotinib.
Melphalan Injection	Melphalan Injection The risk or severity of bleeding can be increased when Warfarin is combined with Melphalan.
Cabergoline	Cabergoline The serum concentration of Warfarin can be increased when it is combined with Cabergoline.
Naloxone Injection	Naloxone Injection The serum concentration of Warfarin can be increased when it is combined with Naloxone.
Fondaparinux Injection	Fondaparinux Injection Fondaparinux may decrease the excretion rate of Warfarin which could result in a higher serum level.
Collagenase Clostridium Histolyticum Injection	Collagenase Clostridium Histolyticum Injection The risk or severity of adverse effects can be increased when Warfarin is combined with Collagenase clostridium histolyticum.
Carfilzomib Injection	Carfilzomib Injection The risk or severity of bleeding can be increased when Warfarin is combined with Carfilzomib.
Iloprost	Iloprost The risk or severity of bleeding can be increased when Iloprost is combined with Warfarin.
Enzalutamide	Enzalutamide The metabolism of Warfarin can be increased when combined with Enzalutamide.
Mirabegron	Mirabegron Warfarin may decrease the excretion rate of Mirabegron which could result in a higher serum level.
Regorafenib	Regorafenib The serum concentration of Warfarin can be increased when it is combined with Regorafenib.
Bosutinib	Bosutinib The serum concentration of Warfarin can be increased when it is combined with Bosutinib.
Corticotropin, Repository Injection	Corticotropin, Repository Injection The metabolism of Warfarin can be increased when combined with Corticotropin.
Teriflunomide	Teriflunomide The serum concentration of Warfarin can be decreased when it is combined with Teriflunomide.
Cabozantinib (thyroid cancer)	Cabozantinib (thyroid cancer) The metabolism of Cabozantinib can be decreased when combined with Warfarin.
Teduglutide Injection	Teduglutide Injection Teduglutide may decrease the excretion rate of Warfarin which could result in a higher serum level.
Bedaquiline	Bedaquiline The risk or severity of bleeding can be increased when Bedaquiline is combined with Warfarin.
Icosapent Ethyl	Icosapent Ethyl The risk or severity of bleeding can be increased when Icosapent ethyl is combined with Warfarin.
Tofacitinib	Tofacitinib The risk or severity of bleeding can be increased when Warfarin is combined with Tofacitinib.
Alogliptin	Alogliptin Warfarin may decrease the excretion rate of Alogliptin which could result in a higher serum level.
Ponatinib	Ponatinib The metabolism of Ponatinib can be increased when combined with Warfarin.
Pomalidomide	Pomalidomide The metabolism of Pomalidomide can be increased when combined with Warfarin.
Ado-trastuzumab Emtansine Injection	Ado-trastuzumab Emtansine Injection The serum concentration of Warfarin can be increased when it is combined with Trastuzumab emtansine.
Apixaban	Apixaban Apixaban may increase the anticoagulant activities of Warfarin.
Canagliflozin	Canagliflozin Canagliflozin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Methazolamide	Methazolamide Methazolamide may increase the excretion rate of Warfarin which could result in a lower serum level and potentially a reduction in efficacy.
Dabrafenib	Dabrafenib The metabolism of Warfarin can be increased when combined with Dabrafenib.
Ospemifene	Ospemifene The metabolism of Ospemifene can be decreased when combined with Warfarin.
Trametinib	Trametinib The metabolism of Warfarin can be increased when combined with Trametinib.
Levomilnacipran	Levomilnacipran The risk or severity of hemorrhage can be increased when Levomilnacipran is combined with Warfarin.
Ertapenem Injection	Ertapenem Injection Ertapenem may decrease the excretion rate of Warfarin which could result in a higher serum level.
Tigecycline Injection	Tigecycline Injection The serum concentration of Warfarin can be increased when it is combined with Tigecycline.
Vortioxetine	Vortioxetine The metabolism of Vortioxetine can be decreased when combined with Warfarin.
Perampanel	Perampanel The metabolism of Warfarin can be increased when combined with Perampanel.
Ibrutinib	Ibrutinib The risk or severity of bleeding and hemorrhage can be increased when Ibrutinib is combined with Warfarin.
Lomitapide	Lomitapide The serum concentration of Warfarin can be increased when it is combined with Lomitapide.
Ketorolac Injection	Ketorolac Injection The risk or severity of bleeding and hemorrhage can be increased when Ketorolac is combined with Warfarin.
Obinutuzumab Injection	Obinutuzumab Injection The risk or severity of bleeding and hemorrhage can be increased when Warfarin is combined with Obinutuzumab.
Simeprevir	Simeprevir The serum concentration of Warfarin can be increased when it is combined with Simeprevir.
Sofosbuvir	Sofosbuvir Sofosbuvir may decrease the excretion rate of Warfarin which could result in a higher serum level.
Dapagliflozin	Dapagliflozin The metabolism of Warfarin can be decreased when combined with Dapagliflozin.
Apremilast	Apremilast The metabolism of Warfarin can be increased when combined with Apremilast.
Droxidopa	Droxidopa Droxidopa may decrease the excretion rate of Warfarin which could result in a higher serum level.
Ceritinib	Ceritinib The serum concentration of Warfarin can be increased when it is combined with Ceritinib.
Siltuximab Injection	Siltuximab Injection The metabolism of Warfarin can be increased when combined with Siltuximab.
Eslicarbazepine	Eslicarbazepine The metabolism of Warfarin can be increased when combined with Eslicarbazepine.
Belinostat Injection	Belinostat Injection The metabolism of Warfarin can be increased when combined with Belinostat.
Dalbavancin Injection	Dalbavancin Injection The risk or severity of bleeding can be increased when Dalbavancin is combined with Warfarin.
Tedizolid	Tedizolid The risk or severity of bleeding can be increased when Tedizolid is combined with Warfarin.
Idelalisib	Idelalisib The serum concentration of Warfarin can be increased when it is combined with Idelalisib.
Testosterone Injection	Testosterone Injection The metabolism of Warfarin can be increased when combined with Testosterone.
Oritavancin Injection	Oritavancin Injection The risk or severity of bleeding can be increased when Oritavancin is combined with Warfarin.
Vorapaxar	Vorapaxar The risk or severity of bleeding and hemorrhage can be increased when Vorapaxar is combined with Warfarin.
Suvorexant	Suvorexant The metabolism of Warfarin can be decreased when combined with Suvorexant.
Edoxaban	Edoxaban The risk or severity of bleeding can be increased when Edoxaban is combined with Warfarin.
Peginterferon Beta-1a Injection	Peginterferon Beta-1a Injection The metabolism of Warfarin can be decreased when combined with Peginterferon beta-1a.
Olaparib	Olaparib The serum concentration of Warfarin can be increased when it is combined with Olaparib.
Blinatumomab Injection	Blinatumomab Injection The risk or severity of bleeding can be increased when Warfarin is combined with Blinatumomab.
Caspofungin Injection	Caspofungin Injection The therapeutic efficacy of Warfarin can be increased when used in combination with Caspofungin.
Methamphetamine	Methamphetamine Metamfetamine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Tasimelteon	Tasimelteon The metabolism of Warfarin can be decreased when combined with Tasimelteon.
Riociguat	Riociguat The metabolism of Riociguat can be decreased when combined with Warfarin.
Lanreotide Injection	Lanreotide Injection The serum concentration of Warfarin can be increased when it is combined with Lanreotide.
Pirfenidone	Pirfenidone The metabolism of Pirfenidone can be decreased when combined with Warfarin.
Nintedanib	Nintedanib The risk or severity of bleeding can be increased when Warfarin is combined with Nintedanib.
Secukinumab Injection	Secukinumab Injection The metabolism of Warfarin can be increased when combined with Secukinumab.
Risperidone Injection	Risperidone Injection The risk or severity of adverse effects can be increased when Risperidone is combined with Warfarin.
Palbociclib	Palbociclib The serum concentration of Warfarin can be increased when it is combined with Palbociclib.
Insulin Human Inhalation	Insulin Human Inhalation The metabolism of Warfarin can be increased when combined with Insulin human.
Lenvatinib	Lenvatinib The metabolism of Warfarin can be increased when combined with Lenvatinib.
Panobinostat	Panobinostat The metabolism of Panobinostat can be increased when combined with Warfarin.
Dinutuximab Injection	Dinutuximab Injection The risk or severity of bleeding can be increased when Warfarin is combined with Dinutuximab.
Haloperidol Injection	Haloperidol Injection The serum concentration of Warfarin can be increased when it is combined with Haloperidol.
Deoxycholic Acid Injection	Deoxycholic Acid Injection The risk or severity of bleeding and bruising can be increased when Warfarin is combined with Deoxycholic acid.
Amiloride	Amiloride Amiloride may increase the excretion rate of Warfarin which could result in a lower serum level and potentially a reduction in efficacy.
Isavuconazonium Injection	Isavuconazonium Injection The metabolism of Warfarin can be increased when combined with Isavuconazonium.
Macitentan	Macitentan Warfarin may decrease the excretion rate of Macitentan which could result in a higher serum level.
Sonidegib	Sonidegib The metabolism of Sonidegib can be increased when combined with Warfarin.
Flibanserin	Flibanserin The risk or severity of adverse effects can be increased when Flibanserin is combined with Warfarin.
Prednisolone	Prednisolone The metabolism of Warfarin can be increased when combined with Prednisolone.
Brexpiprazole	Brexpiprazole The risk or severity of adverse effects can be increased when Brexpiprazole is combined with Warfarin.
Ziprasidone Injection	Ziprasidone Injection The serum concentration of Warfarin can be increased when it is combined with Ziprasidone.
Cariprazine	Cariprazine The risk or severity of adverse effects can be increased when Cariprazine is combined with Warfarin.
Penicillin G Procaine Injection	Penicillin G Procaine Injection Procaine benzylpenicillin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Insulin Degludec (rDNA Origin) Injection	Insulin Degludec (rDNA Origin) Injection The metabolism of Warfarin can be increased when combined with Insulin degludec.
Cobimetinib	Cobimetinib The metabolism of Warfarin can be increased when combined with Cobimetinib.
Trabectedin Injection	Trabectedin Injection The metabolism of Trabectedin can be increased when combined with Warfarin.
Osimertinib	Osimertinib The serum concentration of Warfarin can be decreased when it is combined with Osimertinib.
Alectinib	Alectinib The metabolism of Alectinib can be increased when combined with Warfarin.
Ixazomib	Ixazomib The metabolism of Ixazomib can be increased when combined with Warfarin.
Rifapentine	Rifapentine The metabolism of Warfarin can be increased when combined with Rifapentine.
Lesinurad	Lesinurad The metabolism of Warfarin can be increased when combined with Lesinurad.
Amphotericin B Liposomal Injection	Amphotericin B Liposomal Injection The serum concentration of Warfarin can be increased when it is combined with Amphotericin B.
Dexamethasone Injection	Dexamethasone Injection The metabolism of Warfarin can be increased when combined with Dexamethasone.
Defibrotide Injection	Defibrotide Injection The risk or severity of bleeding can be increased when Defibrotide is combined with Warfarin.
Brivaracetam Injection	Brivaracetam Injection The metabolism of Brivaracetam can be decreased when combined with Warfarin.
Venetoclax	Venetoclax The serum concentration of Warfarin can be increased when it is combined with Venetoclax.
Cobicistat	Cobicistat The serum concentration of Warfarin can be increased when it is combined with Cobicistat.
Selexipag	Selexipag The metabolism of Selexipag can be decreased when combined with Warfarin.
Pimavanserin	Pimavanserin The risk or severity of adverse effects can be increased when Pimavanserin is combined with Warfarin.
Obeticholic Acid	Obeticholic Acid The therapeutic efficacy of Obeticholic acid can be decreased when used in combination with Warfarin.
Diphenhydramine Injection	Diphenhydramine Injection The metabolism of Diphenhydramine can be decreased when combined with Warfarin.
Furosemide Injection	Furosemide Injection Furosemide may decrease the excretion rate of Warfarin which could result in a higher serum level.
Rucaparib	Rucaparib The serum concentration of Warfarin can be increased when it is combined with Rucaparib.
Lixisenatide Injection	Lixisenatide Injection Lixisenatide can cause a decrease in the absorption of Warfarin resulting in a reduced serum concentration and potentially a decrease in efficacy.
Ribociclib	Ribociclib The serum concentration of Warfarin can be increased when it is combined with Ribociclib.
Brigatinib	Brigatinib The metabolism of Warfarin can be increased when combined with Brigatinib.
Doxepin (Insomnia)	Doxepin (Insomnia) The metabolism of Doxepin can be decreased when combined with Warfarin.
Deutetrabenazine	Deutetrabenazine Warfarin may decrease the excretion rate of Deutetrabenazine which could result in a higher serum level.
Valbenazine	Valbenazine Warfarin may decrease the excretion rate of Valbenazine which could result in a higher serum level.
Deflazacort	Deflazacort Deflazacort may increase the anticoagulant activities of Warfarin.
Safinamide	Safinamide The metabolism of Warfarin can be decreased when combined with Safinamide.
Naldemedine	Naldemedine Naldemedine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Sarilumab Injection	Sarilumab Injection The metabolism of Warfarin can be increased when combined with Sarilumab.
Midostaurin	Midostaurin The metabolism of Warfarin can be increased when combined with Midostaurin.
Neratinib	Neratinib The metabolism of Neratinib can be increased when combined with Warfarin.
Enasidenib	Enasidenib The metabolism of Warfarin can be increased when combined with Enasidenib.
Aprepitant/Fosaprepitant Injection	Aprepitant/Fosaprepitant Injection The metabolism of Warfarin can be increased when combined with Fosaprepitant.
Benznidazole	Benznidazole Benznidazole may decrease the excretion rate of Warfarin which could result in a higher serum level.
Copanlisib Injection	Copanlisib Injection The metabolism of Copanlisib can be increased when combined with Warfarin.
Delafloxacin	Delafloxacin The metabolism of Warfarin can be increased when combined with Delafloxacin.
Abemaciclib	Abemaciclib The metabolism of Abemaciclib can be increased when combined with Warfarin.
Betrixaban	Betrixaban The risk or severity of bleeding can be increased when Warfarin is combined with Betrixaban.
Acalabrutinib	Acalabrutinib The serum concentration of Warfarin can be increased when it is combined with Acalabrutinib.
Gemtuzumab Ozogamicin Injection	Gemtuzumab Ozogamicin Injection The risk or severity of bleeding can be increased when Warfarin is combined with Gemtuzumab ozogamicin.
Letermovir	Letermovir The serum concentration of Warfarin can be increased when it is combined with Letermovir.
Ertugliflozin	Ertugliflozin Ertugliflozin may increase the excretion rate of Warfarin which could result in a lower serum level and potentially a reduction in efficacy.
Buprenorphine Injection	Buprenorphine Injection The serum concentration of Warfarin can be increased when it is combined with Buprenorphine.
Apalutamide	Apalutamide The metabolism of Warfarin can be increased when combined with Apalutamide.
Penicillamine	Penicillamine The risk or severity of bleeding can be increased when Warfarin is combined with Penicillamine.
Fostamatinib	Fostamatinib The serum concentration of Warfarin can be increased when it is combined with Fostamatinib.
Avatrombopag	Avatrombopag The metabolism of Warfarin can be increased when combined with Avatrombopag.
Baricitinib	Baricitinib The metabolism of Baricitinib can be increased when combined with Warfarin.
Lofexidine	Lofexidine Lofexidine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Plazomicin Injection	Plazomicin Injection Plazomicin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Binimetinib	Binimetinib The metabolism of Binimetinib can be decreased when combined with Warfarin.
Ivosidenib	Ivosidenib The metabolism of Warfarin can be increased when combined with Ivosidenib.
Elagolix	Elagolix The metabolism of Elagolix can be decreased when combined with Warfarin.
Eravacycline Injection	Eravacycline Injection The risk or severity of bleeding can be increased when Eravacycline is combined with Warfarin.
Cannabidiol	Cannabidiol The metabolism of Warfarin can be decreased when combined with Cannabidiol.
Dacomitinib	Dacomitinib The metabolism of Warfarin can be increased when combined with Dacomitinib.
Duvelisib	Duvelisib The metabolism of Warfarin can be decreased when combined with Duvelisib.
Omadacycline	Omadacycline The risk or severity of bleeding can be increased when Omadacycline is combined with Warfarin.
Sarecycline	Sarecycline The risk or severity of bleeding can be increased when Sarecycline is combined with Warfarin.
Stiripentol	Stiripentol The serum concentration of Warfarin can be increased when it is combined with Stiripentol.
Gilteritinib	Gilteritinib The metabolism of Warfarin can be decreased when combined with Gilteritinib.
Glasdegib	Glasdegib The metabolism of Glasdegib can be decreased when combined with Warfarin.
Lorlatinib	Lorlatinib The metabolism of Lorlatinib can be increased when combined with Warfarin.
Paclitaxel (with albumin) Injection	Paclitaxel (with albumin) Injection The therapeutic efficacy of Warfarin can be increased when used in combination with Paclitaxel.
Rifamycin	Rifamycin The metabolism of Warfarin can be increased when combined with Rifamycin.
Prucalopride	Prucalopride The metabolism of Warfarin can be decreased when combined with Prucalopride.
Emapalumab-lzsg Injection	Emapalumab-lzsg Injection The metabolism of Warfarin can be increased when combined with Emapalumab.
Siponimod	Siponimod The metabolism of Siponimod can be decreased when combined with Warfarin.
Acyclovir Ophthalmic	Acyclovir Ophthalmic Acyclovir may decrease the excretion rate of Warfarin which could result in a higher serum level.
Caplacizumab-yhdp Injection	Caplacizumab-yhdp Injection The risk or severity of bleeding can be increased when Caplacizumab is combined with Warfarin.
Erdafitinib	Erdafitinib The metabolism of Erdafitinib can be increased when combined with Warfarin.
Esomeprazole Injection	Esomeprazole Injection The metabolism of Esomeprazole can be decreased when combined with Warfarin.
Alpelisib	Alpelisib The serum concentration of Warfarin can be decreased when it is combined with Alpelisib.
Cladribine	Cladribine The risk or severity of bleeding can be increased when Warfarin is combined with Cladribine.
Solriamfetol	Solriamfetol Solriamfetol may decrease the excretion rate of Warfarin which could result in a higher serum level.
Triclabendazole	Triclabendazole The serum concentration of Warfarin can be increased when it is combined with Triclabendazole.
Entrectinib	Entrectinib The metabolism of Entrectinib can be increased when combined with Warfarin.
Pexidartinib	Pexidartinib The metabolism of Pexidartinib can be increased when combined with Warfarin.
Istradefylline	Istradefylline The metabolism of Istradefylline can be decreased when combined with Warfarin.
Pitolisant	Pitolisant The serum concentration of Warfarin can be decreased when it is combined with Pitolisant.
Fedratinib	Fedratinib The metabolism of Fedratinib can be decreased when combined with Warfarin.
Lefamulin	Lefamulin The serum concentration of Warfarin can be increased when it is combined with Lefamulin.
Phenytoin Injection	Phenytoin Injection The metabolism of Warfarin can be increased when combined with Phenytoin.
Fosphenytoin Injection	Fosphenytoin Injection The metabolism of Warfarin can be increased when combined with Fosphenytoin.
Zanubrutinib	Zanubrutinib The metabolism of Zanubrutinib can be increased when combined with Warfarin.
Voxelotor	Voxelotor The serum concentration of Voxelotor can be increased when it is combined with Warfarin.
Avapritinib	Avapritinib The metabolism of Avapritinib can be decreased when combined with Warfarin.
Lumateperone	Lumateperone The serum concentration of Lumateperone can be decreased when it is combined with Warfarin.
Ubrogepant	Ubrogepant The serum concentration of Ubrogepant can be decreased when it is combined with Warfarin.
Calcium Acetate	Calcium Acetate The therapeutic efficacy of Calcium acetate can be decreased when used in combination with Warfarin.
Tazemetostat	Tazemetostat The metabolism of Warfarin can be decreased when combined with Tazemetostat.
Cenobamate	Cenobamate The serum concentration of Warfarin can be decreased when it is combined with Cenobamate.
Ozanimod	Ozanimod The metabolism of Ozanimod can be decreased when combined with Warfarin.
Selumetinib	Selumetinib The metabolism of Selumetinib can be decreased when combined with Warfarin.
Tucatinib	Tucatinib The metabolism of Tucatinib can be decreased when combined with Warfarin.
Remdesivir Injection	Remdesivir Injection The serum concentration of Warfarin can be increased when it is combined with Remdesivir.
Capmatinib	Capmatinib The serum concentration of Warfarin can be increased when it is combined with Capmatinib.
Fenfluramine	Fenfluramine The risk or severity of adverse effects can be increased when Fenfluramine is combined with Warfarin.
Octreotide	Octreotide The serum concentration of Warfarin can be increased when it is combined with Octreotide.
Pralsetinib	Pralsetinib The serum concentration of Warfarin can be increased when it is combined with Pralsetinib.
Satralizumab-mwge Injection	Satralizumab-mwge Injection The serum concentration of Warfarin can be decreased when it is combined with Satralizumab.
Progestin-Only (drospirenone) Oral Contraceptives	Progestin-Only (drospirenone) Oral Contraceptives The metabolism of Warfarin can be decreased when combined with Drospirenone.
Viloxazine	Viloxazine The metabolism of Warfarin can be decreased when combined with Viloxazine.
Vitamin E (Alpha-Tocopherol)	Vitamin E (Alpha-Tocopherol) Vitamin E may increase the anticoagulant activities of Warfarin.
Tobramycin Injection	Tobramycin Injection Tobramycin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Theophylline	Theophylline The metabolism of Theophylline can be increased when combined with Warfarin.
Fenoprofen	Fenoprofen The risk or severity of bleeding and hemorrhage can be increased when Fenoprofen is combined with Warfarin.
Indomethacin	Indomethacin The risk or severity of bleeding and hemorrhage can be increased when Indomethacin is combined with Warfarin.
Mefenamic Acid	Mefenamic Acid The risk or severity of bleeding and hemorrhage can be increased when Mefenamic acid is combined with Warfarin.
Naproxen	Naproxen The risk or severity of bleeding and hemorrhage can be increased when Naproxen is combined with Warfarin.
Tolmetin	Tolmetin The risk or severity of bleeding and hemorrhage can be increased when Tolmetin is combined with Warfarin.
Sulindac	Sulindac The risk or severity of bleeding and hemorrhage can be increased when Sulindac is combined with Warfarin.
Trazodone	Trazodone Trazodone may decrease the anticoagulant activities of Warfarin.
Isotretinoin	Isotretinoin Warfarin may decrease the excretion rate of Isotretinoin which could result in a higher serum level.
Sucralfate	Sucralfate The therapeutic efficacy of Warfarin can be decreased when used in combination with Sucralfate.
Hydroxyurea	Hydroxyurea The risk or severity of bleeding can be increased when Warfarin is combined with Hydroxyurea.
Floxuridine	Floxuridine The metabolism of Warfarin can be decreased when combined with Floxuridine.
Phenobarbital	Phenobarbital The metabolism of Warfarin can be increased when combined with Phenobarbital.
Metaxalone	Metaxalone Metaxalone may decrease the excretion rate of Warfarin which could result in a higher serum level.
Methotrexate Injection	Methotrexate Injection The metabolism of Warfarin can be increased when combined with Methotrexate.
Primidone	Primidone The metabolism of Warfarin can be increased when combined with Primidone.
Methsuximide	Methsuximide The metabolism of Methsuximide can be decreased when combined with Warfarin.
Chlorpromazine	Chlorpromazine The metabolism of Warfarin can be increased when combined with Chlorpromazine.
Diazepam	Diazepam The serum concentration of Warfarin can be increased when it is combined with Diazepam.
Oxazepam	Oxazepam Warfarin may decrease the excretion rate of Oxazepam which could result in a higher serum level.
Flurazepam	Flurazepam Warfarin may decrease the excretion rate of Flurazepam which could result in a higher serum level.
Clorazepate	Clorazepate Clorazepic acid may decrease the excretion rate of Warfarin which could result in a higher serum level.
Lorazepam	Lorazepam The metabolism of Warfarin can be decreased when combined with Lorazepam.
Carmustine	Carmustine Carmustine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Amantadine	Amantadine Amantadine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Codeine	Codeine Codeine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Bromocriptine	Bromocriptine The serum concentration of Warfarin can be increased when it is combined with Bromocriptine.
Tranylcypromine	Tranylcypromine The serum concentration of Warfarin can be increased when it is combined with Tranylcypromine.
Phenelzine	Phenelzine The serum concentration of Warfarin can be increased when it is combined with Phenelzine.
Procarbazine	Procarbazine The risk or severity of bleeding and hemorrhage can be increased when Procarbazine is combined with Warfarin.
Ergoloid Mesylates	Ergoloid Mesylates The risk or severity of adverse effects can be increased when Ergoloid mesylate is combined with Warfarin.
Tetracycline	Tetracycline The serum concentration of Warfarin can be increased when it is combined with Tetracycline.
Thioguanine	Thioguanine The risk or severity of bleeding can be increased when Warfarin is combined with Tioguanine.
Minocycline	Minocycline The risk or severity of bleeding can be increased when Minocycline is combined with Warfarin.
Demeclocycline	Demeclocycline The risk or severity of bleeding can be increased when Demeclocycline is combined with Warfarin.
Prochlorperazine	Prochlorperazine The metabolism of Warfarin can be decreased when combined with Prochlorperazine.
Thioridazine	Thioridazine The metabolism of Thioridazine can be decreased when combined with Warfarin.
Trifluoperazine	Trifluoperazine The metabolism of Trifluoperazine can be decreased when combined with Warfarin.
Bleomycin	Bleomycin Bleomycin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Dapsone	Dapsone The metabolism of Dapsone can be decreased when combined with Warfarin.
Sulfadiazine	Sulfadiazine The metabolism of Sulfadiazine can be decreased when combined with Warfarin.
Methadone	Methadone The serum concentration of Warfarin can be increased when it is combined with Methadone.
Oxybutynin	Oxybutynin The serum concentration of Warfarin can be increased when it is combined with Oxybutynin.
Benztropine	Benztropine Benzatropine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Colestipol	Colestipol Colestipol can cause a decrease in the absorption of Warfarin resulting in a reduced serum concentration and potentially a decrease in efficacy.
Maprotiline	Maprotiline Maprotiline may decrease the excretion rate of Warfarin which could result in a higher serum level.
Ibuprofen	Ibuprofen The metabolism of Warfarin can be decreased when combined with Ibuprofen.
Orphenadrine	Orphenadrine The serum concentration of Warfarin can be increased when it is combined with Orphenadrine.
Perphenazine	Perphenazine The metabolism of Perphenazine can be decreased when combined with Warfarin.
Azathioprine	Azathioprine The therapeutic efficacy of Warfarin can be decreased when used in combination with Azathioprine.
Phentermine	Phentermine The metabolism of Warfarin can be decreased when combined with Phentermine.
Methylphenidate	Methylphenidate The metabolism of Warfarin can be decreased when combined with Methylphenidate.
Amoxapine	Amoxapine The risk or severity of adverse effects can be increased when Amoxapine is combined with Warfarin.
Sulfasalazine	Sulfasalazine The risk or severity of bleeding and hemorrhage can be increased when Sulfasalazine is combined with Warfarin.
Hydrocortisone	Hydrocortisone The metabolism of Warfarin can be increased when combined with Hydrocortisone.
Lomustine	Lomustine The risk or severity of bleeding can be increased when Warfarin is combined with Lomustine.
Doxorubicin	Doxorubicin The serum concentration of Warfarin can be increased when it is combined with Doxorubicin.
Cytarabine	Cytarabine The risk or severity of bleeding can be increased when Warfarin is combined with Cytarabine.
Mechlorethamine	Mechlorethamine The risk or severity of bleeding can be increased when Warfarin is combined with Mechlorethamine.
Dactinomycin	Dactinomycin The risk or severity of bleeding can be increased when Warfarin is combined with Dactinomycin.
Phenazopyridine	Phenazopyridine Phenazopyridine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Carbamazepine	Carbamazepine The metabolism of Warfarin can be increased when combined with Carbamazepine.
Methyldopa	Methyldopa Methyldopa may decrease the excretion rate of Warfarin which could result in a higher serum level.
Clonidine	Clonidine The metabolism of Warfarin can be increased when combined with Clonidine.
Hydralazine	Hydralazine The serum concentration of Warfarin can be increased when it is combined with Hydralazine.
Cimetidine	Cimetidine The serum concentration of Warfarin can be increased when it is combined with Cimetidine.
Gentamicin Injection	Gentamicin Injection Gentamicin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Clonazepam	Clonazepam The metabolism of Clonazepam can be increased when combined with Warfarin.
Loperamide	Loperamide The serum concentration of Warfarin can be increased when it is combined with Loperamide.
Promethazine	Promethazine The metabolism of Warfarin can be decreased when combined with Promethazine.
Meclofenamate	Meclofenamate The risk or severity of bleeding and hemorrhage can be increased when Meclofenamic acid is combined with Warfarin.
Daunorubicin	Daunorubicin The serum concentration of Warfarin can be increased when it is combined with Daunorubicin.
Nitrofurantoin	Nitrofurantoin Nitrofurantoin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Griseofulvin	Griseofulvin The metabolism of Warfarin can be increased when combined with Griseofulvin.
Methenamine	Methenamine The risk or severity of bleeding can be increased when Methenamine is combined with Warfarin.
Digoxin	Digoxin Digoxin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Loxapine	Loxapine The risk or severity of adverse effects can be increased when Loxapine is combined with Warfarin.
Chloroquine	Chloroquine Warfarin may decrease the excretion rate of Chloroquine which could result in a higher serum level.
Quinine	Quinine The metabolism of Warfarin can be increased when combined with Quinine.
Calcitriol	Calcitriol The metabolism of Warfarin can be increased when combined with Calcitriol.
Triamterene	Triamterene Triamterene may decrease the excretion rate of Warfarin which could result in a higher serum level.
Lactulose	Lactulose The risk or severity of bleeding can be increased when Lactulose is combined with Warfarin.
Sulfinpyrazone	Sulfinpyrazone The metabolism of Warfarin can be increased when combined with Sulfinpyrazone.
Chlorothiazide	Chlorothiazide Chlorothiazide may increase the excretion rate of Warfarin which could result in a lower serum level and potentially a reduction in efficacy.
Chlorthalidone	Chlorthalidone Chlorthalidone may increase the excretion rate of Warfarin which could result in a lower serum level and potentially a reduction in efficacy.
Metolazone	Metolazone Metolazone may decrease the excretion rate of Warfarin which could result in a higher serum level.
Isosorbide	Isosorbide The therapeutic efficacy of Warfarin can be decreased when used in combination with Isosorbide.
Clindamycin Injection	Clindamycin Injection The risk or severity of bleeding can be increased when Clindamycin is combined with Warfarin.
Secobarbital	Secobarbital The metabolism of Warfarin can be increased when combined with Secobarbital.
Desipramine	Desipramine The serum concentration of Warfarin can be increased when it is combined with Desipramine.
Amitriptyline	Amitriptyline The metabolism of Amitriptyline can be decreased when combined with Warfarin.
Imipramine	Imipramine The metabolism of Warfarin can be decreased when combined with Imipramine.
Probenecid	Probenecid The metabolism of Warfarin can be increased when combined with Probenecid.
Quinidine	Quinidine The serum concentration of Warfarin can be increased when it is combined with Quinidine.
Procainamide	Procainamide Warfarin may decrease the excretion rate of Procainamide which could result in a higher serum level.
Isoniazid	Isoniazid The serum concentration of Warfarin can be increased when it is combined with Isoniazid.
Pyrazinamide	Pyrazinamide Pyrazinamide may decrease the excretion rate of Warfarin which could result in a higher serum level.
Rifampin	Rifampin The metabolism of Warfarin can be increased when combined with Rifampicin.
Disopyramide	Disopyramide Disopyramide may decrease the excretion rate of Warfarin which could result in a higher serum level.
Valproic Acid	Valproic Acid The serum concentration of Warfarin can be increased when it is combined with Valproic acid.
Tamoxifen	Tamoxifen The risk or severity of bleeding can be increased when Tamoxifen is combined with Warfarin.
Mitomycin	Mitomycin The risk or severity of bleeding can be increased when Warfarin is combined with Mitomycin.
Butabarbital	Butabarbital Butabarbital may decrease the excretion rate of Warfarin which could result in a higher serum level.
Levothyroxine	Levothyroxine The therapeutic efficacy of Levothyroxine can be increased when used in combination with Warfarin.
Liothyronine	Liothyronine The risk or severity of bleeding can be increased when Liothyronine is combined with Warfarin.
Methimazole	Methimazole Methimazole may decrease the anticoagulant activities of Warfarin.
Propylthiouracil	Propylthiouracil Propylthiouracil may increase the anticoagulant activities of Warfarin.
Chlorpropamide	Chlorpropamide The therapeutic efficacy of Warfarin can be increased when used in combination with Chlorpropamide.
Glucagon Injection	Glucagon Injection The therapeutic efficacy of Warfarin can be increased when used in combination with Glucagon.
Tolbutamide	Tolbutamide The therapeutic efficacy of Warfarin can be increased when used in combination with Tolbutamide.
Tolazamide	Tolazamide The therapeutic efficacy of Warfarin can be increased when used in combination with Tolazamide.
Dextromethorphan	Dextromethorphan The metabolism of Dextromethorphan can be decreased when combined with Warfarin.
Cyclobenzaprine	Cyclobenzaprine The metabolism of Cyclobenzaprine can be decreased when combined with Warfarin.
Niacin	Niacin The metabolism of Warfarin can be decreased when combined with Niacin.
Baclofen	Baclofen Baclofen may decrease the excretion rate of Warfarin which could result in a higher serum level.
Cyproheptadine	Cyproheptadine The risk or severity of adverse effects can be increased when Cyproheptadine is combined with Warfarin.
Chlorpheniramine	Chlorpheniramine The risk or severity of adverse effects can be increased when Chlorpheniramine is combined with Warfarin.
Ethambutol	Ethambutol Ethambutol may decrease the excretion rate of Warfarin which could result in a higher serum level.
Methyclothiazide	Methyclothiazide Methyclothiazide may increase the excretion rate of Warfarin which could result in a lower serum level and potentially a reduction in efficacy.
Hydrochlorothiazide	Hydrochlorothiazide Hydrochlorothiazide may decrease the excretion rate of Warfarin which could result in a higher serum level.
Chlorzoxazone	Chlorzoxazone Chlorzoxazone may decrease the excretion rate of Warfarin which could result in a higher serum level.
Carisoprodol	Carisoprodol The metabolism of Carisoprodol can be decreased when combined with Warfarin.
Pyridoxine	Pyridoxine Pyridoxine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Folic Acid	Folic Acid Folic acid may decrease the excretion rate of Warfarin which could result in a higher serum level.
Danazol	Danazol The serum concentration of Warfarin can be increased when it is combined with Danazol.
Disulfiram	Disulfiram Disulfiram may increase the anticoagulant activities of Warfarin.
Propranolol (Cardiovascular)	Propranolol (Cardiovascular) The serum concentration of Propranolol can be increased when it is combined with Warfarin.
Nortriptyline	Nortriptyline The metabolism of Warfarin can be increased when combined with Nortriptyline.
Spironolactone	Spironolactone Spironolactone may increase the excretion rate of Warfarin which could result in a lower serum level and potentially a reduction in efficacy.
Amphotericin B Injection	Amphotericin B Injection The serum concentration of Warfarin can be increased when it is combined with Amphotericin B.
Mercaptopurine	Mercaptopurine The therapeutic efficacy of Warfarin can be decreased when used in combination with Mercaptopurine.
Phytonadione	Phytonadione The therapeutic efficacy of Warfarin can be decreased when used in combination with Phylloquinone.
Amikacin Injection	Amikacin Injection Amikacin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Nadolol	Nadolol Nadolol may decrease the excretion rate of Warfarin which could result in a higher serum level.
Cholestyramine Resin	Cholestyramine Resin Cholestyramine can cause a decrease in the absorption of Warfarin resulting in a reduced serum concentration and potentially a decrease in efficacy.
Allopurinol	Allopurinol The risk or severity of bleeding can be increased when Allopurinol is combined with Warfarin.
Fluoxymesterone	Fluoxymesterone Fluoxymesterone may increase the anticoagulant activities of Warfarin.
Flavoxate	Flavoxate Flavoxate may decrease the excretion rate of Warfarin which could result in a higher serum level.
Fluorouracil Injection	Fluorouracil Injection The metabolism of Fluorouracil can be decreased when combined with Warfarin.
Colchicine	Colchicine The metabolism of Warfarin can be increased when combined with Colchicine.
Cefaclor	Cefaclor Cefaclor may decrease the excretion rate of Warfarin which could result in a higher serum level.
Cefadroxil	Cefadroxil Cefadroxil may decrease the excretion rate of Warfarin which could result in a higher serum level.
Cefazolin Injection	Cefazolin Injection Cefazolin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Cephalexin	Cephalexin Cephalexin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Cefoxitin Injection	Cefoxitin Injection Cefoxitin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Dacarbazine	Dacarbazine The metabolism of Warfarin can be decreased when combined with Dacarbazine.
Acetazolamide	Acetazolamide The serum concentration of Warfarin can be increased when it is combined with Acetazolamide.
Cefotaxime Injection	Cefotaxime Injection Cefotaxime may decrease the excretion rate of Warfarin which could result in a higher serum level.
Calcitonin Salmon Injection	Calcitonin Salmon Injection Salmon calcitonin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Ketoconazole	Ketoconazole The serum concentration of Warfarin can be increased when it is combined with Ketoconazole.
Pyrantel	Pyrantel Pyrantel may decrease the excretion rate of Warfarin which could result in a higher serum level.
Thiotepa Injection	Thiotepa Injection The metabolism of Thiotepa can be increased when combined with Warfarin.
Vincristine Injection	Vincristine Injection The metabolism of Vincristine can be increased when combined with Warfarin.
Dipyridamole	Dipyridamole The risk or severity of bleeding can be increased when Dipyridamole is combined with Warfarin.
Vinblastine	Vinblastine The metabolism of Warfarin can be increased when combined with Vinblastine.
Ethacrynic Acid	Ethacrynic Acid The protein binding of Warfarin can be decreased when combined with Etacrynic acid.
Colistimethate Injection	Colistimethate Injection Colistimethate may decrease the excretion rate of Warfarin which could result in a higher serum level.
Metoprolol	Metoprolol The metabolism of Warfarin can be decreased when combined with Metoprolol.
Thiothixene	Thiothixene The metabolism of Thiothixene can be decreased when combined with Warfarin.
Aspirin	Aspirin Acetylsalicylic acid may increase the anticoagulant activities of Warfarin.
Salsalate	Salsalate The risk or severity of bleeding and hemorrhage can be increased when Salsalate is combined with Warfarin.
Chlorambucil	Chlorambucil The risk or severity of bleeding can be increased when Warfarin is combined with Chlorambucil.
Alprazolam	Alprazolam Warfarin may decrease the excretion rate of Alprazolam which could result in a higher serum level.
Temazepam	Temazepam Temazepam may decrease the excretion rate of Warfarin which could result in a higher serum level.
Triazolam	Triazolam Warfarin may decrease the excretion rate of Triazolam which could result in a higher serum level.
Dicyclomine	Dicyclomine Dicyclomine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Propantheline	Propantheline Propantheline may decrease the excretion rate of Warfarin which could result in a higher serum level.
Trimethoprim	Trimethoprim The metabolism of Trimethoprim can be decreased when combined with Warfarin.
Diltiazem	Diltiazem The serum concentration of Warfarin can be increased when it is combined with Diltiazem.
Nifedipine	Nifedipine The metabolism of Warfarin can be increased when combined with Nifedipine.
Timolol	Timolol Timolol may decrease the excretion rate of Warfarin which could result in a higher serum level.
Verapamil	Verapamil The serum concentration of Warfarin can be increased when it is combined with Verapamil.
Pindolol	Pindolol Pindolol may decrease the excretion rate of Warfarin which could result in a higher serum level.
Cisplatin Injection	Cisplatin Injection The metabolism of Warfarin can be decreased when combined with Cisplatin.
Diflunisal	Diflunisal The risk or severity of bleeding and hemorrhage can be increased when Diflunisal is combined with Warfarin.
Piroxicam	Piroxicam The risk or severity of bleeding and hemorrhage can be increased when Piroxicam is combined with Warfarin.
Bumetanide	Bumetanide Bumetanide may decrease the excretion rate of Warfarin which could result in a higher serum level.
Streptozocin	Streptozocin The metabolism of Warfarin can be increased when combined with Streptozocin.
Etoposide	Etoposide The therapeutic efficacy of Warfarin can be increased when used in combination with Etoposide.
Glyburide	Glyburide The serum concentration of Warfarin can be increased when it is combined with Glyburide.
Glipizide	Glipizide The therapeutic efficacy of Glipizide can be increased when used in combination with Warfarin.
Indapamide	Indapamide Indapamide may decrease the excretion rate of Warfarin which could result in a higher serum level.
Amoxicillin	Amoxicillin Amoxicillin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Dicloxacillin	Dicloxacillin The metabolism of Warfarin can be increased when combined with Dicloxacillin.
Nafcillin Injection	Nafcillin Injection The metabolism of Warfarin can be increased when combined with Nafcillin.
Oxacillin Injection	Oxacillin Injection Oxacillin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Pentoxifylline	Pentoxifylline The therapeutic efficacy of Warfarin can be increased when used in combination with Pentoxifylline.
Pentamidine Injection	Pentamidine Injection The therapeutic efficacy of Warfarin can be increased when used in combination with Pentamidine.
Ceftriaxone Injection	Ceftriaxone Injection Ceftriaxone may decrease the excretion rate of Warfarin which could result in a higher serum level.
Labetalol	Labetalol Labetalol may decrease the excretion rate of Warfarin which could result in a higher serum level.
Auranofin	Auranofin Auranofin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Leuprolide Injection	Leuprolide Injection Leuprolide may decrease the excretion rate of Warfarin which could result in a higher serum level.
Gemfibrozil	Gemfibrozil The metabolism of Warfarin can be decreased when combined with Gemfibrozil.
Guanabenz	Guanabenz The metabolism of Warfarin can be decreased when combined with Guanabenz.
Dipivefrin Ophthalmic	Dipivefrin Ophthalmic Adefovir dipivoxil may decrease the excretion rate of Warfarin which could result in a higher serum level.
Ceftazidime Injection	Ceftazidime Injection Ceftazidime may decrease the excretion rate of Warfarin which could result in a higher serum level.
Ketoprofen	Ketoprofen The risk or severity of bleeding and hemorrhage can be increased when Ketoprofen is combined with Warfarin.
Cefotetan Injection	Cefotetan Injection Cefotetan may decrease the excretion rate of Warfarin which could result in a higher serum level.
Pimozide	Pimozide The serum concentration of Warfarin can be increased when it is combined with Pimozide.
Flurbiprofen	Flurbiprofen The risk or severity of bleeding and hemorrhage can be increased when Flurbiprofen is combined with Warfarin.
Amiodarone	Amiodarone The risk or severity of bleeding can be increased when Amiodarone is combined with Warfarin.
Aztreonam Injection	Aztreonam Injection Aztreonam may decrease the excretion rate of Warfarin which could result in a higher serum level.
Mupirocin	Mupirocin The risk or severity of bleeding can be increased when Mupirocin is combined with Warfarin.
Buspirone	Buspirone Buspirone may decrease the excretion rate of Warfarin which could result in a higher serum level.
Lovastatin	Lovastatin The serum concentration of Warfarin can be increased when it is combined with Lovastatin.
Ciprofloxacin	Ciprofloxacin The serum concentration of Warfarin can be increased when it is combined with Ciprofloxacin.
Mesalamine	Mesalamine The risk or severity of bleeding and hemorrhage can be increased when Mesalazine is combined with Warfarin.
Diclofenac	Diclofenac The risk or severity of bleeding and hemorrhage can be increased when Diclofenac is combined with Warfarin.
Fluoxetine	Fluoxetine The risk or severity of hemorrhage can be increased when Fluoxetine is combined with Warfarin.
Interferon Alfa-2b Injection	Interferon Alfa-2b Injection The metabolism of Warfarin can be decreased when combined with Interferon alfa-2b.
Cefixime	Cefixime The risk or severity of bleeding can be increased when Cefixime is combined with Warfarin.
Clozapine	Clozapine The metabolism of Warfarin can be increased when combined with Clozapine.
Estazolam	Estazolam Warfarin may decrease the excretion rate of Estazolam which could result in a higher serum level.
Idarubicin	Idarubicin The metabolism of Idarubicin can be decreased when combined with Warfarin.
Ofloxacin	Ofloxacin The therapeutic efficacy of Warfarin can be increased when used in combination with Ofloxacin.
Didanosine	Didanosine Didanosine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Fludarabine Injection	Fludarabine Injection The risk or severity of bleeding can be increased when Warfarin is combined with Fludarabine.
Pentostatin Injection	Pentostatin Injection Pentostatin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Clarithromycin	Clarithromycin The serum concentration of Warfarin can be increased when it is combined with Clarithromycin.
Etodolac	Etodolac The risk or severity of bleeding and hemorrhage can be increased when Etodolac is combined with Warfarin.
Felodipine	Felodipine The serum concentration of Warfarin can be increased when it is combined with Felodipine.
Fosinopril	Fosinopril Fosinopril may decrease the excretion rate of Warfarin which could result in a higher serum level.
Nabumetone	Nabumetone The risk or severity of bleeding and hemorrhage can be increased when Nabumetone is combined with Warfarin.
Pravastatin	Pravastatin The risk or severity of bleeding can be increased when Pravastatin is combined with Warfarin.
Simvastatin	Simvastatin Simvastatin may increase the anticoagulant activities of Warfarin.
Teniposide Injection	Teniposide Injection The serum concentration of Warfarin can be increased when it is combined with Teniposide.
Itraconazole	Itraconazole The serum concentration of Warfarin can be increased when it is combined with Itraconazole.
Lisinopril	Lisinopril Lisinopril may decrease the excretion rate of Warfarin which could result in a higher serum level.
Oxaprozin	Oxaprozin The risk or severity of bleeding and hemorrhage can be increased when Oxaprozin is combined with Warfarin.
Atovaquone	Atovaquone The metabolism of Warfarin can be decreased when combined with Atovaquone.
Rifabutin	Rifabutin The metabolism of Warfarin can be increased when combined with Rifabutin.
Bisoprolol	Bisoprolol Bisoprolol may decrease the excretion rate of Warfarin which could result in a higher serum level.
Zolpidem	Zolpidem The metabolism of Zolpidem can be decreased when combined with Warfarin.
Doxazosin	Doxazosin The metabolism of Warfarin can be decreased when combined with Doxazosin.
Isradipine	Isradipine The serum concentration of Warfarin can be increased when it is combined with Isradipine.
Omeprazole	Omeprazole The metabolism of Warfarin can be increased when combined with Omeprazole.
Cisapride	Cisapride The metabolism of Warfarin can be decreased when combined with Cisapride.
Fluvastatin	Fluvastatin The metabolism of Warfarin can be decreased when combined with Fluvastatin.
Venlafaxine	Venlafaxine The metabolism of Venlafaxine can be decreased when combined with Warfarin.
Famciclovir	Famciclovir The metabolism of Warfarin can be decreased when combined with Famciclovir.
Fluvoxamine	Fluvoxamine The serum concentration of Warfarin can be increased when it is combined with Fluvoxamine.
Nefazodone	Nefazodone The serum concentration of Warfarin can be increased when it is combined with Nefazodone.
Lamotrigine	Lamotrigine Lamotrigine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Losartan	Losartan The serum concentration of Warfarin can be increased when it is combined with Losartan.
Valacyclovir	Valacyclovir Valaciclovir may decrease the excretion rate of Warfarin which could result in a higher serum level.
Tramadol	Tramadol The therapeutic efficacy of Warfarin can be increased when used in combination with Tramadol.
Vinorelbine Injection	Vinorelbine Injection The metabolism of Vinorelbine can be increased when combined with Warfarin.
Carboplatin Injection	Carboplatin Injection Carboplatin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Lansoprazole	Lansoprazole The therapeutic efficacy of Warfarin can be increased when used in combination with Lansoprazole.
Ifosfamide Injection	Ifosfamide Injection The metabolism of Warfarin can be increased when combined with Ifosfamide.
Nicardipine	Nicardipine The serum concentration of Warfarin can be increased when it is combined with Nicardipine.
Bupropion	Bupropion The metabolism of Bupropion can be decreased when combined with Warfarin.
Ticlopidine	Ticlopidine The risk or severity of bleeding can be increased when Ticlopidine is combined with Warfarin.
Saquinavir	Saquinavir The serum concentration of Warfarin can be increased when it is combined with Saquinavir.
Metformin	Metformin Metformin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Dalteparin Injection	Dalteparin Injection The risk or severity of bleeding can be increased when Warfarin is combined with Dalteparin.
Nisoldipine	Nisoldipine Nisoldipine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Lamivudine	Lamivudine Lamivudine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Riluzole	Riluzole The metabolism of Riluzole can be decreased when combined with Warfarin.
Acarbose	Acarbose Acarbose may decrease the excretion rate of Warfarin which could result in a higher serum level.
Glimepiride	Glimepiride The therapeutic efficacy of Warfarin can be increased when used in combination with Glimepiride.
Gemcitabine Injection	Gemcitabine Injection The therapeutic efficacy of Warfarin can be increased when used in combination with Gemcitabine.
Indinavir	Indinavir The serum concentration of Warfarin can be increased when it is combined with Indinavir.
Ritonavir	Ritonavir The serum concentration of Warfarin can be decreased when it is combined with Ritonavir.
Docetaxel Injection	Docetaxel Injection The serum concentration of Warfarin can be increased when it is combined with Docetaxel.
Cidofovir Injection	Cidofovir Injection Cidofovir may decrease the excretion rate of Warfarin which could result in a higher serum level.
Meropenem Injection	Meropenem Injection Meropenem may decrease the excretion rate of Warfarin which could result in a higher serum level.
Clomipramine	Clomipramine The metabolism of Clomipramine can be increased when combined with Warfarin.
Zafirlukast	Zafirlukast The serum concentration of Warfarin can be increased when it is combined with Zafirlukast.
Fosfomycin	Fosfomycin Fosfomycin may decrease the excretion rate of Warfarin which could result in a higher serum level.
Mirtazapine	Mirtazapine Mirtazapine may increase the anticoagulant activities of Warfarin.
Topiramate	Topiramate The metabolism of Warfarin can be increased when combined with Topiramate.
Zileuton	Zileuton The metabolism of Warfarin can be decreased when combined with Zileuton.
Valsartan	Valsartan The metabolism of Warfarin can be decreased when combined with Valsartan.
Insulin Lispro Injection	Insulin Lispro Injection The metabolism of Warfarin can be increased when combined with Insulin lispro.
Pramipexole	Pramipexole Pramipexole may decrease the excretion rate of Warfarin which could result in a higher serum level.
Donepezil	Donepezil The metabolism of Donepezil can be decreased when combined with Warfarin.
Nelfinavir	Nelfinavir The serum concentration of Warfarin can be increased when it is combined with Nelfinavir.
Azithromycin	Azithromycin The risk or severity of adverse effects can be increased when Azithromycin is combined with Warfarin.
Carvedilol	Carvedilol The metabolism of Carvedilol can be decreased when combined with Warfarin.
Nilutamide	Nilutamide The metabolism of Warfarin can be decreased when combined with Nilutamide.
Flutamide	Flutamide Flutamide may decrease the excretion rate of Warfarin which could result in a higher serum level.
Selegiline	Selegiline The metabolism of Selegiline can be decreased when combined with Warfarin.
Bicalutamide	Bicalutamide The serum concentration of Warfarin can be increased when it is combined with Bicalutamide.
Sertraline	Sertraline The risk or severity of bleeding can be increased when Sertraline is combined with Warfarin.
Propafenone	Propafenone The metabolism of Warfarin can be decreased when combined with Propafenone.
Raloxifene	Raloxifene The serum concentration of Warfarin can be increased when it is combined with Raloxifene.
Irbesartan	Irbesartan The serum concentration of Warfarin can be increased when it is combined with Irbesartan.
Tamsulosin	Tamsulosin Warfarin may decrease the excretion rate of Tamsulosin which could result in a higher serum level.
Ropinirole	Ropinirole The risk or severity of adverse effects can be increased when Ropinirole is combined with Warfarin.
Quetiapine	Quetiapine Quetiapine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Cefepime Injection	Cefepime Injection Cefepime may decrease the excretion rate of Warfarin which could result in a higher serum level.
Cefprozil	Cefprozil Cefprozil may decrease the excretion rate of Warfarin which could result in a higher serum level.
Cefpodoxime	Cefpodoxime Cefpodoxime may decrease the excretion rate of Warfarin which could result in a higher serum level.
Cetirizine	Cetirizine Cetirizine may decrease the excretion rate of Warfarin which could result in a higher serum level.
Paroxetine	Paroxetine The risk or severity of bleeding can be increased when Paroxetine is combined with Warfarin.
Tolcapone	Tolcapone The metabolism of Warfarin can be decreased when combined with Tolcapone.
Citalopram	Citalopram Warfarin may increase the QTc-prolonging activities of Citalopram.
Capecitabine	Capecitabine Warfarin may increase the anticoagulant activities of Capecitabine.
Efavirenz	Efavirenz The metabolism of Warfarin can be increased when combined with Efavirenz.
Abacavir	Abacavir Abacavir may decrease the excretion rate of Warfarin which could result in a higher serum level.
Sildenafil	Sildenafil The risk or severity of hemorrhage can be increased when Warfarin is combined with Sildenafil.
Pioglitazone	Pioglitazone The metabolism of Pioglitazone can be decreased when combined with Warfarin.
Celecoxib	Celecoxib The risk or severity of bleeding and hemorrhage can be increased when Celecoxib is combined with Warfarin.
Rosiglitazone	Rosiglitazone The metabolism of Rosiglitazone can be decreased when combined with Warfarin.
Tolterodine	Tolterodine The metabolism of Warfarin can be decreased when combined with Tolterodine.
Thalidomide	Thalidomide The metabolism of Thalidomide can be decreased when combined with Warfarin.
Oseltamivir	Oseltamivir Oseltamivir may decrease the excretion rate of Warfarin which could result in a higher serum level.
Colesevelam	Colesevelam Colesevelam can cause a decrease in the absorption of Warfarin resulting in a reduced serum concentration and potentially a decrease in efficacy.
Balsalazide	Balsalazide The risk or severity of bleeding and hemorrhage can be increased when Balsalazide is combined with Warfarin.
Nateglinide	Nateglinide The metabolism of Nateglinide can be decreased when combined with Warfarin.
Rabeprazole	Rabeprazole The serum concentration of Warfarin can be increased when it is combined with Rabeprazole.
Terbinafine	Terbinafine The metabolism of Warfarin can be increased when combined with Terbinafine.