Tamoxifen

Generic name: Pronounced as (ta mox' i fen)
Brand names
  • Nolvadex®
  • Soltamox®
Click on drug name to hear pronunciation

Medical Content Reviewed By HelloPharmacist Staff

Last Revised - 01/15/2018

Tamoxifen may cause cancer of the uterus (womb), strokes, and blood clots in the lungs. These conditions may be serious or fatal. Tell your doctor if you have ever had a blood clot in the lungs or legs, a stroke, or a heart attack. Also tell your doctor if you smoke, if you have high blood pressure or diabetes, if your ability to move around during your waking hours is limited, or if you are taking anticoagulants ('blood thinners') such as warfarin (Coumadin). If you experience any of the following symptoms during or after your treatment, call your doctor immediately: abnormal vaginal bleeding; irregular menstrual periods; changes in vaginal discharge, especially if the discharge becomes bloody, brown, or rusty; pain or pressure in the pelvis (the stomach area below the belly button); leg swelling or tenderness; chest pain; shortness of breath; coughing up blood; sudden weakness, tingling, or numbness in your face, arm, or leg, especially on one side of your body; sudden confusion; difficulty speaking or understanding; sudden difficulty seeing in one or both eyes; sudden difficulty walking; dizziness; loss of balance or coordination; or sudden severe headache.

Keep all appointments with your doctor. You will need to have gynecological examinations (examinations of the female organs) regularly to find early signs of cancer of the uterus.

If you are thinking about taking tamoxifen to reduce the chance that you will develop breast cancer, you should talk to your doctor about the risks and benefits of this treatment. You and your doctor will decide whether the possible benefit of tamoxifen treatment is worth the risks of taking the medication. If you need to take tamoxifen to treat breast cancer, the benefits of tamoxifen outweigh the risks.

Your doctor or pharmacist will give you the manufacturer's patient information sheet (Medication Guide) when you begin treatment with tamoxifen and each time you refill your prescription. Read the information carefully and ask your doctor or pharmacist if you have any questions. You can also visit the Food and Drug Administration (FDA) website (http://www.fda.gov/Drugs/DrugSafety/ucm085729.htm) or the manufacturer's website to obtain the Medication Guide.

Tamoxifen is used to treat breast cancer that has spread to other parts of the body in men and women. It is used to treat early breast cancer in women who have already been treated with surgery, radiation, and/or chemotherapy. It is used to reduce the risk of developing a more serious type of breast cancer in women who have had ductal carcinoma in situ (DCIS; a type of breast cancer that does not spread outside of the milk duct where it forms) and who have been treated with surgery and radiation. It is used to reduce the risk of breast cancer in women who are at high risk for the disease due to their age, personal medical history, and family medical history.

Tamoxifen is in a class of medications known as antiestrogens. It blocks the activity of estrogen (a female hormone) in the breast. This may stop the growth of some breast tumors that need estrogen to grow.

Tamoxifen comes as a tablet to take by mouth. Tamoxifen is usually taken once or twice a day with or without food. Take tamoxifen at around the same time(s) every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain anything you do not understand. Take tamoxifen exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

Swallow tamoxifen tablets whole; do not split, chew, or crush them. Swallow the tablets with water or any other nonalcoholic drink.

If you are taking tamoxifen to prevent breast cancer, you will probably take it for five years. If you are taking tamoxifen to treat breast cancer, your doctor will decide how long your treatment will last. Do not stop taking tamoxifen without talking to your doctor.

If you forget to take a dose of tamoxifen, take the missed dose as soon as you remember it, and take your next dose as usual. However, if it is almost time for your next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.

Tamoxifen is also used sometimes to induce ovulation (egg production) in women who do not produce eggs but wish to become pregnant. Tamoxifen is also sometimes used to treat McCune-Albright syndrome (MAS; a condition that may cause bone disease, early sexual development, and dark colored spots on the skin in children). Talk to your doctor about the possible risks of using this drug for your condition.

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

Before taking tamoxifen,

  • tell your doctor and pharmacist if you are allergic to tamoxifen or any other medications.

  • tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Be sure to mention any of the following: aminoglutethimide (Cytadren); anastrozole (Arimidex), bromocriptine (Parlodel); cancer chemotherapy medication such as cyclophosphamide (Cytoxan, Neosar) letrozole (Femara); medroxyprogesterone (Depo-Provera, Provera, in Prempro); phenobarbital; and rifampin (Rifadin, Rimactane). Your doctor may need to change the doses of your medications or monitor you carefully for side effects.

  • in addition to the conditions listed in the IMPORTANT WARNING section, tell your doctor if you have or have ever had high blood levels of cholesterol.

  • tell your doctor if you are pregnant or plan to become pregnant. You should not plan to become pregnant while taking tamoxifen or for 2 months after your treatment. Your doctor may perform a pregnancy test or tell you to begin your treatment during your menstrual period to be sure that you are not pregnant when you begin taking tamoxifen. You will need to use a reliable nonhormonal method of birth control to prevent pregnancy while you are taking tamoxifen and for 2 months after your treatment. Talk to your doctor about the types of birth control that are right for you, and continue to use birth control even if you do not have regular menstrual periods during your treatment. Stop taking tamoxifen and call your doctor right away if you think you have become pregnant during your treatment. Tamoxifen may harm the fetus.

  • tell your doctor if you are breast-feeding. You should not breastfeed during your treatment with tamoxifen.

  • tell all of your doctors and other health care providers that you are taking tamoxifen.

  • you will still need to look for early signs of breast cancer since it is possible to develop breast cancer even during treatment with tamoxifen. Talk to your doctor about how often you should examine your breasts yourself, have a doctor examine your breasts, and have mammograms (x-ray examinations of the breasts). Call your doctor right away if you find a new lump in your breast.

Take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.

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

    • increased bone or tumor pain

    • pain or reddening around the tumor site

    • hot flashes

    • nausea

    • excessive tiredness

    • dizziness

    • depression

    • headache

    • thinning of hair

    • weight loss

    • stomach cramps

    • constipation

    • loss of sexual desire or ability (in men)

  • Some side effects can be serious. If you experience any of the following symptoms or those listed in the IMPORTANT WARNING section, call your doctor immediately:

    • vision problems

    • loss of appetite

    • yellowing of the skin or eyes

    • unusual bruising or bleeding

    • fever

    • blisters

    • rash

    • swelling of the eyes, face, lips, tongue, throat, hands, arms, feet, ankles, or lower legs

    • thirst

    • muscle weakness

    • restlessness

  • Tamoxifen may increase the risk that you will develop other cancers, including liver cancer. Talk to your doctor about this risk.

  • Tamoxifen may increase the risk that you will develop cataracts (clouding of the lens in the eye) that may need to be treated with surgery. Talk to your doctor about this risk.

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

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

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:

  • uncontrollable shaking of a part of the body

  • unsteadiness

  • dizziness

  • Keep all appointments with your doctor and the laboratory. Your doctor will order certain lab tests to check your body's response to tamoxifen.

  • Before having any laboratory test, tell your doctor and the laboratory personnel that you are taking tamoxifen.

  • Do not let anyone else take your medication. Talk to your pharmacist if you have any questions 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 metabolism of Moxifloxacin can be decreased when combined with Tamoxifen.
Repaglinide Repaglinide Tamoxifen may decrease the excretion rate of Repaglinide which could result in a higher serum level.
Montelukast Montelukast The metabolism of Tamoxifen can be decreased when combined with Montelukast.
Insulin Glargine (rDNA origin) Injection Insulin Glargine (rDNA origin) Injection The metabolism of Tamoxifen can be increased when combined with Insulin glargine.
Leflunomide Leflunomide The serum concentration of Leflunomide can be decreased when it is combined with Tamoxifen.
Delavirdine Delavirdine The metabolism of Tamoxifen can be decreased when combined with Delavirdine.
Nevirapine Nevirapine The metabolism of Nevirapine can be decreased when combined with Tamoxifen.
Atorvastatin Atorvastatin The metabolism of Atorvastatin can be decreased when combined with Tamoxifen.
Dolasetron Dolasetron The metabolism of Dolasetron can be decreased when combined with Tamoxifen.
Aminophylline Aminophylline The metabolism of Aminophylline can be increased when combined with Tamoxifen.
Anagrelide Anagrelide The metabolism of Anagrelide can be decreased when combined with Tamoxifen.
Candesartan Candesartan The metabolism of Candesartan can be decreased when combined with Tamoxifen.
Cilostazol Cilostazol The metabolism of Cilostazol can be decreased when combined with Tamoxifen.
Clopidogrel Clopidogrel The metabolism of Clopidogrel can be decreased when combined with Tamoxifen.
Erythromycin and Sulfisoxazole Erythromycin and Sulfisoxazole The metabolism of Tamoxifen can be decreased when combined with Erythromycin.
Estrogen and Progestin (Oral Contraceptives) Estrogen and Progestin (Oral Contraceptives) The metabolism of Tamoxifen can be decreased when combined with Conjugated estrogens.
Fenofibrate Fenofibrate The metabolism of Fenofibrate can be decreased when combined with Tamoxifen.
Methylergonovine Methylergonovine The metabolism of Tamoxifen can be decreased when combined with Methylergometrine.
Paregoric Paregoric The serum concentration of Morphine can be increased when it is combined with Tamoxifen.
Penbutolol Penbutolol The metabolism of Acebutolol can be decreased when combined with Tamoxifen.
Prednisone Prednisone The metabolism of Tamoxifen can be increased when combined with Prednisone.
Ranitidine Ranitidine The metabolism of Ranitidine can be decreased when combined with Tamoxifen.
Reserpine Reserpine The metabolism of Tamoxifen can be increased when combined with Reserpine.
Tacrolimus Tacrolimus The serum concentration of Tacrolimus can be increased when it is combined with Tamoxifen.
Tizanidine Tizanidine The metabolism of Tizanidine can be decreased when combined with Tamoxifen.
Triamcinolone Triamcinolone The metabolism of Tamoxifen can be increased when combined with Triamcinolone.
Zolmitriptan Zolmitriptan The metabolism of Tamoxifen can be decreased when combined with Zolmitriptan.
Doxycycline Injection Doxycycline Injection The metabolism of Tamoxifen can be decreased when combined with Doxycycline.
Famotidine Injection Famotidine Injection The metabolism of Famotidine can be decreased when combined with Tamoxifen.
Fluconazole Injection Fluconazole Injection The metabolism of Tamoxifen can be decreased when combined with Fluconazole.
Foscarnet Injection Foscarnet Injection The risk or severity of QTc prolongation can be increased when Foscarnet is combined with Tamoxifen.
Hydromorphone Injection Hydromorphone Injection The metabolism of Hydromorphone can be decreased when combined with Tamoxifen.
Interferon Beta-1b Injection Interferon Beta-1b Injection The metabolism of Tamoxifen can be decreased when combined with Interferon beta-1b.
Interferon Gamma-1b Injection Interferon Gamma-1b Injection The metabolism of Tamoxifen can be decreased when combined with Interferon gamma-1b.
Levofloxacin Injection Levofloxacin Injection The metabolism of Tamoxifen can be decreased when combined with Levofloxacin.
Meperidine Injection Meperidine Injection The metabolism of Tamoxifen can be increased when combined with Meperidine.
Methylprednisolone Injection Methylprednisolone Injection The metabolism of Tamoxifen can be increased when combined with Methylprednisolone.
Metoclopramide Injection Metoclopramide Injection The metabolism of Metoclopramide can be decreased when combined with Tamoxifen.
Metronidazole Injection Metronidazole Injection The metabolism of Tamoxifen can be decreased when combined with Metronidazole.
Morphine Injection Morphine Injection The serum concentration of Morphine can be increased when it is combined with Tamoxifen.
Zidovudine Injection Zidovudine Injection The metabolism of Zidovudine can be decreased when combined with Tamoxifen.
Altretamine Altretamine The metabolism of Amphetamine can be decreased when combined with Tamoxifen.
Cyclosporine Cyclosporine The metabolism of Cyclosporine can be decreased when combined with Tamoxifen.
Ondansetron Ondansetron The metabolism of Ondansetron can be decreased when combined with Tamoxifen.
Enoxaparin Injection Enoxaparin Injection The risk or severity of bleeding can be increased when Tamoxifen is combined with Enoxaparin.
Granisetron Granisetron The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Granisetron.
Torsemide Torsemide The metabolism of Torasemide can be decreased when combined with Tamoxifen.
Olanzapine Olanzapine The metabolism of Tamoxifen can be decreased when combined with Olanzapine.
Alosetron Alosetron The metabolism of Alosetron can be decreased when combined with Tamoxifen.
Dofetilide Dofetilide The metabolism of Dofetilide can be increased when combined with Tamoxifen.
Entacapone Entacapone The metabolism of Tamoxifen can be decreased when combined with Entacapone.
Hydroxychloroquine Hydroxychloroquine The metabolism of Tamoxifen can be decreased when combined with Hydroxychloroquine.
Meloxicam Meloxicam The metabolism of Meloxicam can be decreased when combined with Tamoxifen.
Orlistat Orlistat The metabolism of Tamoxifen can be increased when combined with Orlistat.
Oxcarbazepine Oxcarbazepine The metabolism of Tamoxifen can be increased when combined with Oxcarbazepine.
Pantoprazole Pantoprazole The metabolism of Tamoxifen can be decreased when combined with Pantoprazole.
Telmisartan Telmisartan The metabolism of Telmisartan can be decreased when combined with Tamoxifen.
Zaleplon Zaleplon The metabolism of Zaleplon can be decreased when combined with Tamoxifen.
Anakinra Anakinra The metabolism of Tamoxifen can be increased when combined with Anakinra.
Desloratadine Desloratadine The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Desloratadine.
Pentosan Polysulfate Pentosan Polysulfate The risk or severity of bleeding can be increased when Tamoxifen is combined with Pentosan polysulfate.
Trimipramine Trimipramine The metabolism of Trimipramine can be decreased when combined with Tamoxifen.
Etanercept Injection Etanercept Injection The metabolism of Tamoxifen can be increased when combined with Etanercept.
Modafinil Modafinil The metabolism of Tamoxifen can be decreased when combined with Modafinil.
Tenofovir Tenofovir The metabolism of Tenofovir can be decreased when combined with Tamoxifen.
Sirolimus Sirolimus The metabolism of Sirolimus can be increased when combined with Tamoxifen.
Dutasteride Dutasteride The metabolism of Dutasteride can be decreased when combined with Tamoxifen.
Epinephrine Injection Epinephrine Injection The metabolism of Tamoxifen can be decreased when combined with Epinephrine.
Epirubicin Epirubicin The risk or severity of cardiotoxicity can be increased when Epirubicin is combined with Tamoxifen.
Eplerenone Eplerenone The metabolism of Eplerenone can be decreased when combined with Tamoxifen.
Escitalopram Escitalopram The serum concentration of Escitalopram can be increased when it is combined with Tamoxifen.
Olmesartan Olmesartan The risk or severity of liver damage can be increased when Olmesartan is combined with Tamoxifen.
Zonisamide Zonisamide The metabolism of Zonisamide can be decreased when combined with Tamoxifen.
Adalimumab Injection Adalimumab Injection The metabolism of Tamoxifen can be increased when combined with Adalimumab.
Aripiprazole Aripiprazole The metabolism of Aripiprazole can be increased when combined with Tamoxifen.
Atomoxetine Atomoxetine The metabolism of Atomoxetine can be decreased when combined with Tamoxifen.
Ezetimibe Ezetimibe Tamoxifen may decrease the excretion rate of Ezetimibe which could result in a higher serum level.
Atazanavir Atazanavir The metabolism of Atazanavir can be decreased when combined with Tamoxifen.
Almotriptan Almotriptan The metabolism of Almotriptan can be decreased when combined with Tamoxifen.
Eletriptan Eletriptan The metabolism of Eletriptan can be decreased when combined with Tamoxifen.
Mefloquine Mefloquine The metabolism of Tamoxifen can be decreased when combined with Mefloquine.
Rosuvastatin Rosuvastatin The metabolism of Rosuvastatin can be decreased when combined with Tamoxifen.
Vardenafil Vardenafil The metabolism of Vardenafil can be decreased when combined with Tamoxifen.
Alfuzosin Alfuzosin The metabolism of Alfuzosin can be decreased when combined with Tamoxifen.
Aprepitant Aprepitant The metabolism of Tamoxifen can be decreased when combined with Aprepitant.
Interferon Beta-1a Subcutaneous Injection Interferon Beta-1a Subcutaneous Injection The metabolism of Tamoxifen can be decreased when combined with Interferon beta-1a.
Memantine Memantine The metabolism of Tamoxifen can be decreased when combined with Memantine.
Tegaserod Tegaserod The metabolism of Tamoxifen can be decreased when combined with Tegaserod.
Tadalafil Tadalafil The metabolism of Tadalafil can be decreased when combined with Tamoxifen.
Frovatriptan Frovatriptan The metabolism of Frovatriptan can be decreased when combined with Tamoxifen.
Gemifloxacin Gemifloxacin The metabolism of Gemifloxacin can be decreased when combined with Tamoxifen.
Progesterone Progesterone The metabolism of Tamoxifen can be increased when combined with Progesterone.
Apomorphine Injection Apomorphine Injection The metabolism of Apomorphine can be decreased when combined with Tamoxifen.
Darbepoetin Alfa Injection Darbepoetin Alfa Injection The risk or severity of Thrombosis can be increased when Darbepoetin alfa is combined with Tamoxifen.
Infliximab Injection Infliximab Injection The metabolism of Tamoxifen can be increased when combined with Infliximab.
Oxandrolone Oxandrolone The metabolism of Tamoxifen can be decreased when combined with Oxandrolone.
Protriptyline Protriptyline The metabolism of Tamoxifen can be decreased when combined with Protriptyline.
Rifaximin Rifaximin The serum concentration of Rifaximin can be increased when it is combined with Tamoxifen.
Duloxetine Duloxetine The metabolism of Tamoxifen can be decreased when combined with Duloxetine.
Norethindrone Norethindrone The metabolism of Norethisterone can be decreased when combined with Tamoxifen.
Tinidazole Tinidazole Tamoxifen may decrease the excretion rate of Tinidazole which could result in a higher serum level.
Trospium Trospium The metabolism of Tamoxifen can be decreased when combined with Trospium.
Bosentan Bosentan The metabolism of Tamoxifen can be increased when combined with Bosentan.
Cinacalcet Cinacalcet The metabolism of Tamoxifen can be decreased when combined with Cinacalcet.
Erlotinib Erlotinib The serum concentration of Erlotinib can be decreased when it is combined with Tamoxifen.
Eszopiclone Eszopiclone The serum concentration of Eszopiclone can be decreased when it is combined with Tamoxifen.
Solifenacin Solifenacin The metabolism of Solifenacin can be decreased when combined with Tamoxifen.
Voriconazole Voriconazole The metabolism of Tamoxifen can be decreased when combined with Voriconazole.
Dextroamphetamine Dextroamphetamine The metabolism of Amphetamine can be decreased when combined with Tamoxifen.
Entecavir Entecavir The metabolism of Tamoxifen can be decreased when combined with Entecavir.
Peginterferon Alfa-2a Injection Peginterferon Alfa-2a Injection The metabolism of Tamoxifen can be decreased when combined with Peginterferon alfa-2a.
Peginterferon Alfa-2b (PEG-Intron) Peginterferon Alfa-2b (PEG-Intron) The serum concentration of Tamoxifen can be increased when it is combined with Peginterferon alfa-2b.
Ibandronate Ibandronate The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Ibandronate.
Ramelteon Ramelteon The metabolism of Ramelteon can be decreased when combined with Tamoxifen.
Darifenacin Darifenacin The metabolism of Darifenacin can be decreased when combined with Tamoxifen.
Fentanyl Fentanyl The metabolism of Fentanyl can be decreased when combined with Tamoxifen.
Pregabalin Pregabalin The risk or severity of QTc prolongation can be increased when Pregabalin is combined with Tamoxifen.
Deferasirox Deferasirox The serum concentration of Tamoxifen can be increased when it is combined with Deferasirox.
Phenylephrine Phenylephrine The metabolism of Tamoxifen can be increased when combined with Phenylephrine.
Tipranavir Tipranavir The metabolism of Tipranavir can be decreased when combined with Tamoxifen.
Felbamate Felbamate The metabolism of Tamoxifen can be increased when combined with Felbamate.
Ranolazine Ranolazine The metabolism of Tamoxifen can be increased when combined with Ranolazine.
Abatacept Injection Abatacept Injection The metabolism of Tamoxifen can be increased when combined with Abatacept.
Rasagiline Rasagiline The metabolism of Rasagiline can be decreased when combined with Tamoxifen.
Imatinib Imatinib The metabolism of Tamoxifen can be decreased when combined with Imatinib.
Sitagliptin Sitagliptin The serum concentration of Sitagliptin can be increased when it is combined with Tamoxifen.
Bevacizumab Injection Bevacizumab Injection The risk or severity of cardiotoxicity can be increased when Bevacizumab is combined with Tamoxifen.
Gefitinib Gefitinib The metabolism of Tamoxifen can be decreased when combined with Gefitinib.
Albuterol Albuterol The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Salbutamol.
Paliperidone Paliperidone The metabolism of Paliperidone can be decreased when combined with Tamoxifen.
Bortezomib Bortezomib The metabolism of Tamoxifen can be increased when combined with Bortezomib.
Insulin Glulisine (rDNA origin) Injection Insulin Glulisine (rDNA origin) Injection The metabolism of Tamoxifen can be increased when combined with Insulin glulisine.
Oxaliplatin Injection Oxaliplatin Injection The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Oxaliplatin.
Posaconazole Posaconazole The metabolism of Posaconazole can be decreased when combined with Tamoxifen.
Primaquine Primaquine The metabolism of Tamoxifen can be decreased when combined with Primaquine.
Darunavir Darunavir The serum concentration of Tamoxifen can be increased when it is combined with Darunavir.
Pemetrexed Injection Pemetrexed Injection The metabolism of Tamoxifen can be decreased when combined with Pemetrexed.
Dimenhydrinate Dimenhydrinate The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Dimenhydrinate.
Lisdexamfetamine Lisdexamfetamine The metabolism of Lisdexamfetamine can be decreased when combined with Tamoxifen.
Nabilone Nabilone The metabolism of Tamoxifen can be decreased when combined with Nabilone.
Retapamulin Retapamulin The metabolism of Retapamulin can be decreased when combined with Tamoxifen.
Vorinostat Vorinostat The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Vorinostat.
Sorafenib Sorafenib The metabolism of Tamoxifen can be increased when combined with Sorafenib.
Sunitinib Sunitinib The metabolism of Tamoxifen can be increased when combined with Sunitinib.
Dronabinol Dronabinol The metabolism of Tamoxifen can be decreased when combined with Dronabinol.
Lapatinib Lapatinib The metabolism of Lapatinib can be decreased when combined with Tamoxifen.
Levocetirizine Levocetirizine The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Levocetirizine.
Dasatinib Dasatinib The metabolism of Dasatinib can be increased when combined with Tamoxifen.
Mexiletine Mexiletine The metabolism of Mexiletine can be decreased when combined with Tamoxifen.
Armodafinil Armodafinil The metabolism of Tamoxifen can be decreased when combined with Armodafinil.
Ivermectin Ivermectin The metabolism of Tamoxifen can be increased when combined with Ivermectin.
Temsirolimus Temsirolimus The metabolism of Temsirolimus can be increased when combined with Tamoxifen.
Nilotinib Nilotinib The metabolism of Nilotinib can be decreased when combined with Tamoxifen.
Toremifene Toremifene The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Toremifene.
Bexarotene Bexarotene The metabolism of Tamoxifen can be increased when combined with Bexarotene.
Budesonide Budesonide The metabolism of Tamoxifen can be increased when combined with Budesonide.
Chloramphenicol Injection Chloramphenicol Injection The metabolism of Tamoxifen can be decreased when combined with Chloramphenicol.
Etravirine Etravirine The metabolism of Tamoxifen can be increased when combined with Etravirine.
Arsenic Trioxide Injection Arsenic Trioxide Injection The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Arsenic trioxide.
Mitoxantrone Injection Mitoxantrone Injection The metabolism of Tamoxifen can be decreased when combined with Mitoxantrone.
Desvenlafaxine Desvenlafaxine The metabolism of Tamoxifen can be decreased when combined with Desvenlafaxine.
Cevimeline Cevimeline The metabolism of Cevimeline can be decreased when combined with Tamoxifen.
Nebivolol Nebivolol The metabolism of Nebivolol can be decreased when combined with Tamoxifen.
Tretinoin Tretinoin The metabolism of Tretinoin can be decreased when combined with Tamoxifen.
Bendamustine Injection Bendamustine Injection The serum concentration of Bendamustine can be increased when it is combined with Tamoxifen.
Pilocarpine Pilocarpine The metabolism of Tamoxifen can be decreased when combined with Pilocarpine.
Flecainide Flecainide The metabolism of Flecainide can be decreased when combined with Tamoxifen.
Certolizumab Injection Certolizumab Injection The metabolism of Tamoxifen can be increased when combined with Certolizumab pegol.
Ixabepilone Injection Ixabepilone Injection The metabolism of Ixabepilone can be increased when combined with Tamoxifen.
Irinotecan Injection Irinotecan Injection The metabolism of Irinotecan can be decreased when combined with Tamoxifen.
Praziquantel Praziquantel The metabolism of Praziquantel can be decreased when combined with Tamoxifen.
Mitotane Mitotane The metabolism of Tamoxifen can be increased when combined with Mitotane.
Rufinamide Rufinamide The metabolism of Rufinamide can be increased when combined with Tamoxifen.
Silodosin Silodosin The serum concentration of Silodosin can be increased when it is combined with Tamoxifen.
Midazolam Midazolam The serum concentration of Midazolam can be increased when it is combined with Tamoxifen.
Eltrombopag Eltrombopag The metabolism of Tamoxifen can be decreased when combined with Eltrombopag.
Milnacipran Milnacipran The metabolism of Milnacipran can be increased when combined with Tamoxifen.
Dexlansoprazole Dexlansoprazole The metabolism of Tamoxifen can be decreased when combined with Dexlansoprazole.
Fesoterodine Fesoterodine The metabolism of Fesoterodine can be decreased when combined with Tamoxifen.
Degarelix Injection Degarelix Injection The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Degarelix.
Betaxolol Betaxolol The metabolism of Betaxolol can be decreased when combined with Tamoxifen.
Iloperidone Iloperidone The metabolism of Iloperidone can be decreased when combined with Tamoxifen.
Prasugrel Prasugrel The risk or severity of bleeding can be increased when Tamoxifen is combined with Prasugrel.
Lacosamide Lacosamide The metabolism of Lacosamide can be decreased when combined with Tamoxifen.
Everolimus Everolimus The serum concentration of Everolimus can be increased when it is combined with Tamoxifen.
Tolvaptan (low blood sodium) Tolvaptan (low blood sodium) The serum concentration of Tolvaptan can be increased when it is combined with Tamoxifen.
Dronedarone Dronedarone The serum concentration of Dronedarone can be increased when it is combined with Tamoxifen.
Palonosetron Injection Palonosetron Injection The metabolism of Palonosetron can be decreased when combined with Tamoxifen.
Saxagliptin Saxagliptin The metabolism of Saxagliptin can be decreased when combined with Tamoxifen.
Telavancin Injection Telavancin Injection The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Telavancin.
Romidepsin Injection Romidepsin Injection The metabolism of Romidepsin can be decreased when combined with Tamoxifen.
Tapentadol Tapentadol The metabolism of Tapentadol can be decreased when combined with Tamoxifen.
Topotecan Topotecan The serum concentration of Topotecan can be increased when it is combined with Tamoxifen.
Golimumab Injection Golimumab Injection The metabolism of Tamoxifen can be increased when combined with Golimumab.
Pazopanib Pazopanib The serum concentration of Pazopanib can be increased when it is combined with Tamoxifen.
Asenapine Asenapine The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Asenapine.
Pitavastatin Pitavastatin The metabolism of Pitavastatin can be decreased when combined with Tamoxifen.
Albendazole Albendazole The metabolism of Albendazole can be decreased when combined with Tamoxifen.
Ulipristal Ulipristal The metabolism of Ulipristal can be increased when combined with Tamoxifen.
Levonorgestrel Levonorgestrel The metabolism of Levonorgestrel can be decreased when combined with Tamoxifen.
Oxymorphone Oxymorphone The metabolism of Oxymorphone can be decreased when combined with Tamoxifen.
Dabigatran Dabigatran The risk or severity of bleeding can be increased when Tamoxifen is combined with Dabigatran.
Tocilizumab Injection Tocilizumab Injection The metabolism of Tamoxifen can be increased when combined with Tocilizumab.
Fingolimod Fingolimod The metabolism of Fingolimod can be decreased when combined with Tamoxifen.
Eribulin Injection Eribulin Injection The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Eribulin.
Cabazitaxel Injection Cabazitaxel Injection The serum concentration of Cabazitaxel can be increased when it is combined with Tamoxifen.
Lurasidone Lurasidone The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Lurasidone.
Acetaminophen Injection Acetaminophen Injection Acetaminophen may increase the hepatotoxic activities of Tamoxifen.
Vilazodone Vilazodone The metabolism of Vilazodone can be decreased when combined with Tamoxifen.
Denileukin Diftitox Injection Denileukin Diftitox Injection The metabolism of Tamoxifen can be decreased when combined with Aldesleukin.
Terbutaline Injection Terbutaline Injection The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Terbutaline.
Busulfan Injection Busulfan Injection The metabolism of Busulfan can be increased when combined with Tamoxifen.
Roflumilast Roflumilast The metabolism of Roflumilast can be decreased when combined with Tamoxifen.
Linagliptin Linagliptin The metabolism of Linagliptin can be decreased when combined with Tamoxifen.
Rilpivirine Rilpivirine The metabolism of Tamoxifen can be decreased when combined with Rilpivirine.
Telaprevir Telaprevir The metabolism of Glecaprevir can be decreased when combined with Tamoxifen.
Cyclophosphamide Injection Cyclophosphamide Injection The metabolism of Tamoxifen can be increased when combined with Cyclophosphamide.
Abiraterone Abiraterone The serum concentration of Tamoxifen can be increased when it is combined with Abiraterone.
Triptorelin Injection Triptorelin Injection The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Triptorelin.
Rivaroxaban Rivaroxaban The risk or severity of bleeding can be increased when Tamoxifen is combined with Rivaroxaban.
Ticagrelor Ticagrelor The risk or severity of bleeding can be increased when Tamoxifen is combined with Ticagrelor.
Brentuximab Vedotin Injection Brentuximab Vedotin Injection The serum concentration of Brentuximab vedotin can be increased when it is combined with Tamoxifen.
Ruxolitinib Ruxolitinib The metabolism of Ruxolitinib can be increased when combined with Tamoxifen.
Vandetanib Vandetanib The metabolism of Vandetanib can be increased when combined with Tamoxifen.
Clobazam Clobazam The metabolism of Clobazam can be decreased when combined with Tamoxifen.
Vemurafenib Vemurafenib The serum concentration of Tamoxifen can be increased when it is combined with Vemurafenib.
Vismodegib Vismodegib The metabolism of Tamoxifen can be decreased when combined with Vismodegib.
Ivacaftor Ivacaftor The metabolism of Ivacaftor can be decreased when combined with Tamoxifen.
Axitinib Axitinib The metabolism of Axitinib can be increased when combined with Tamoxifen.
Crizotinib Crizotinib The metabolism of Crizotinib can be decreased when combined with Tamoxifen.
Cabergoline Cabergoline The metabolism of Cabergoline can be increased when combined with Tamoxifen.
Naloxone Injection Naloxone Injection The metabolism of Tamoxifen can be decreased when combined with Naloxone.
Ambrisentan Ambrisentan The metabolism of Ambrisentan can be decreased when combined with Tamoxifen.
Fondaparinux Injection Fondaparinux Injection The risk or severity of bleeding can be increased when Tamoxifen is combined with Fondaparinux.
Pertuzumab Injection Pertuzumab Injection The risk or severity of cardiotoxicity can be increased when Tamoxifen is combined with Pertuzumab.
Carfilzomib Injection Carfilzomib Injection The serum concentration of Carfilzomib can be increased when it is combined with Tamoxifen.
Iloprost Iloprost The risk or severity of bleeding can be increased when Tamoxifen is combined with Iloprost.
Enzalutamide Enzalutamide The metabolism of Tamoxifen can be increased when combined with Enzalutamide.
Mirabegron Mirabegron The serum concentration of Mirabegron can be increased when it is combined with Tamoxifen.
Regorafenib Regorafenib The metabolism of Tamoxifen can be decreased when combined with Regorafenib.
Bosutinib Bosutinib The serum concentration of Bosutinib can be increased when it is combined with Tamoxifen.
Corticotropin, Repository Injection Corticotropin, Repository Injection The metabolism of Tamoxifen can be increased when combined with Corticotropin.
Teriflunomide Teriflunomide The serum concentration of Tamoxifen 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 Tamoxifen.
Bedaquiline Bedaquiline The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Bedaquiline.
Mipomersen Injection Mipomersen Injection Tamoxifen may increase the hepatotoxic activities of Mipomersen.
Tofacitinib Tofacitinib The metabolism of Tofacitinib can be decreased when combined with Tamoxifen.
Alogliptin Alogliptin The metabolism of Alogliptin can be decreased when combined with Tamoxifen.
Ponatinib Ponatinib The metabolism of Tamoxifen can be increased when combined with Ponatinib.
Pomalidomide Pomalidomide The serum concentration of Pomalidomide can be increased when it is combined with Tamoxifen.
Ado-trastuzumab Emtansine Injection Ado-trastuzumab Emtansine Injection The serum concentration of Trastuzumab emtansine can be increased when it is combined with Tamoxifen.
Apixaban Apixaban The risk or severity of bleeding can be increased when Tamoxifen is combined with Apixaban.
Canagliflozin Canagliflozin The serum concentration of Canagliflozin can be increased when it is combined with Tamoxifen.
Dabrafenib Dabrafenib The serum concentration of Tamoxifen can be decreased when it is combined with Dabrafenib.
Ospemifene Ospemifene The risk or severity of adverse effects can be increased when Tamoxifen is combined with Ospemifene.
Trametinib Trametinib The metabolism of Tamoxifen can be increased when combined with Trametinib.
Dolutegravir Dolutegravir The serum concentration of Dolutegravir can be increased when it is combined with Tamoxifen.
Afatinib Afatinib The serum concentration of Afatinib can be increased when it is combined with Tamoxifen.
Levomilnacipran Levomilnacipran The metabolism of Levomilnacipran can be increased when combined with Tamoxifen.
Vortioxetine Vortioxetine The metabolism of Vortioxetine can be decreased when combined with Tamoxifen.
Perampanel Perampanel The metabolism of Perampanel can be increased when combined with Tamoxifen.
Ibrutinib Ibrutinib The metabolism of Ibrutinib can be decreased when combined with Tamoxifen.
Lomitapide Lomitapide The metabolism of Lomitapide can be decreased when combined with Tamoxifen.
Ketorolac Injection Ketorolac Injection The metabolism of Ketorolac can be decreased when combined with Tamoxifen.
Simeprevir Simeprevir The metabolism of Simeprevir can be decreased when combined with Tamoxifen.
Sofosbuvir Sofosbuvir The serum concentration of Sofosbuvir can be increased when it is combined with Tamoxifen.
Dapagliflozin Dapagliflozin The metabolism of Dapagliflozin can be decreased when combined with Tamoxifen.
Apremilast Apremilast The metabolism of Tamoxifen can be increased when combined with Apremilast.
Ceritinib Ceritinib The serum concentration of Ceritinib can be increased when it is combined with Tamoxifen.
Siltuximab Injection Siltuximab Injection The metabolism of Tamoxifen can be increased when combined with Siltuximab.
Eslicarbazepine Eslicarbazepine The metabolism of Tamoxifen can be increased when combined with Eslicarbazepine.
Belinostat Injection Belinostat Injection The metabolism of Belinostat can be increased when combined with Tamoxifen.
Idelalisib Idelalisib The metabolism of Idelalisib can be increased when combined with Tamoxifen.
Testosterone Injection Testosterone Injection The metabolism of Testosterone can be increased when combined with Tamoxifen.
Oritavancin Injection Oritavancin Injection The metabolism of Tamoxifen can be increased when combined with Oritavancin.
Vorapaxar Vorapaxar The risk or severity of bleeding can be increased when Tamoxifen is combined with Vorapaxar.
Hydrocodone Hydrocodone The metabolism of Hydrocodone can be decreased when combined with Tamoxifen.
Suvorexant Suvorexant The metabolism of Suvorexant can be decreased when combined with Tamoxifen.
Edoxaban Edoxaban The serum concentration of Edoxaban can be increased when it is combined with Tamoxifen.
Peginterferon Beta-1a Injection Peginterferon Beta-1a Injection The metabolism of Tamoxifen can be decreased when combined with Peginterferon beta-1a.
Olaparib Olaparib The metabolism of Tamoxifen can be decreased when combined with Olaparib.
Methamphetamine Methamphetamine The metabolism of Metamfetamine can be decreased when combined with Tamoxifen.
Tasimelteon Tasimelteon The metabolism of Tasimelteon can be decreased when combined with Tamoxifen.
Riociguat Riociguat The metabolism of Riociguat can be decreased when combined with Tamoxifen.
Lanreotide Injection Lanreotide Injection The metabolism of Tamoxifen can be decreased when combined with Lanreotide.
Pirfenidone Pirfenidone The metabolism of Pirfenidone can be decreased when combined with Tamoxifen.
Nintedanib Nintedanib The metabolism of Nintedanib can be decreased when combined with Tamoxifen.
Secukinumab Injection Secukinumab Injection The metabolism of Tamoxifen can be increased when combined with Secukinumab.
Risperidone Injection Risperidone Injection The metabolism of Risperidone can be decreased when combined with Tamoxifen.
Palbociclib Palbociclib The metabolism of Tamoxifen can be increased when combined with Palbociclib.
Insulin Human Inhalation Insulin Human Inhalation The metabolism of Tamoxifen can be increased when combined with Insulin human.
Lenvatinib Lenvatinib The metabolism of Lenvatinib can be increased when combined with Tamoxifen.
Naloxegol Naloxegol The serum concentration of Naloxegol can be increased when it is combined with Tamoxifen.
Panobinostat Panobinostat The metabolism of Panobinostat can be decreased when combined with Tamoxifen.
Haloperidol Injection Haloperidol Injection The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Haloperidol.
Ivabradine Ivabradine The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Ivabradine.
Isavuconazonium Injection Isavuconazonium Injection The metabolism of Tamoxifen can be increased when combined with Isavuconazonium.
Sonidegib Sonidegib The metabolism of Sonidegib can be increased when combined with Tamoxifen.
Rolapitant Rolapitant The metabolism of Tamoxifen can be decreased when combined with Rolapitant.
Prednisolone Prednisolone The metabolism of Tamoxifen can be increased when combined with Prednisolone.
Daclatasvir Daclatasvir The metabolism of Tamoxifen can be decreased when combined with Daclatasvir.
Brexpiprazole Brexpiprazole The metabolism of Brexpiprazole can be decreased when combined with Tamoxifen.
Ziprasidone Injection Ziprasidone Injection The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Ziprasidone.
Cariprazine Cariprazine The metabolism of Cariprazine can be decreased when combined with Tamoxifen.
Insulin Degludec (rDNA Origin) Injection Insulin Degludec (rDNA Origin) Injection The metabolism of Tamoxifen can be increased when combined with Insulin degludec.
Cobimetinib Cobimetinib The serum concentration of Cobimetinib can be increased when it is combined with Tamoxifen.
Trabectedin Injection Trabectedin Injection The metabolism of Trabectedin can be increased when combined with Tamoxifen.
Osimertinib Osimertinib The serum concentration of Osimertinib can be decreased when it is combined with Tamoxifen.
Alectinib Alectinib The metabolism of Tamoxifen can be increased when combined with Alectinib.
Ixazomib Ixazomib The metabolism of Ixazomib can be increased when combined with Tamoxifen.
Rifapentine Rifapentine The metabolism of Tamoxifen can be increased when combined with Rifapentine.
Lesinurad Lesinurad The metabolism of Lesinurad can be increased when combined with Tamoxifen.
Amphotericin B Liposomal Injection Amphotericin B Liposomal Injection The metabolism of Tamoxifen can be decreased when combined with Amphotericin B.
Dexamethasone Injection Dexamethasone Injection The metabolism of Tamoxifen can be increased when combined with Dexamethasone.
Defibrotide Injection Defibrotide Injection The risk or severity of bleeding can be increased when Tamoxifen is combined with Defibrotide.
Brivaracetam Injection Brivaracetam Injection The metabolism of Brivaracetam can be decreased when combined with Tamoxifen.
Venetoclax Venetoclax The metabolism of Venetoclax can be increased when combined with Tamoxifen.
Cobicistat Cobicistat The metabolism of Tamoxifen can be decreased when combined with Cobicistat.
Selexipag Selexipag The serum concentration of Selexipag can be increased when it is combined with Tamoxifen.
Obeticholic Acid Obeticholic Acid The risk or severity of adverse effects can be increased when Obeticholic acid is combined with Tamoxifen.
Diphenhydramine Injection Diphenhydramine Injection The metabolism of Diphenhydramine can be decreased when combined with Tamoxifen.
Furosemide Injection Furosemide Injection The therapeutic efficacy of Furosemide can be decreased when used in combination with Tamoxifen.
Rucaparib Rucaparib The metabolism of Tamoxifen can be decreased when combined with Rucaparib.
Ribociclib Ribociclib The metabolism of Ribociclib can be decreased when combined with Tamoxifen.
Brigatinib Brigatinib The metabolism of Tamoxifen can be increased when combined with Brigatinib.
Doxepin (Insomnia) Doxepin (Insomnia) The metabolism of Doxepin can be decreased when combined with Tamoxifen.
Deutetrabenazine Deutetrabenazine The metabolism of Deutetrabenazine can be decreased when combined with Tamoxifen.
Valbenazine Valbenazine The metabolism of Valbenazine can be decreased when combined with Tamoxifen.
Deflazacort Deflazacort The metabolism of Tamoxifen can be increased when combined with Deflazacort.
Safinamide Safinamide The metabolism of Tamoxifen can be decreased when combined with Safinamide.
Sarilumab Injection Sarilumab Injection The metabolism of Tamoxifen can be increased when combined with Sarilumab.
Midostaurin Midostaurin The metabolism of Tamoxifen can be increased when combined with Midostaurin.
Neratinib Neratinib The metabolism of Neratinib can be increased when combined with Tamoxifen.
Enasidenib Enasidenib The metabolism of Tamoxifen can be increased when combined with Enasidenib.
Inotuzumab Ozogamicin Injection Inotuzumab Ozogamicin Injection The serum concentration of Inotuzumab ozogamicin can be increased when it is combined with Tamoxifen.
Aprepitant/Fosaprepitant Injection Aprepitant/Fosaprepitant Injection The metabolism of Fosaprepitant can be increased when combined with Tamoxifen.
Copanlisib Injection Copanlisib Injection The serum concentration of Copanlisib can be increased when it is combined with Tamoxifen.
Delafloxacin Delafloxacin The metabolism of Tamoxifen can be increased when combined with Delafloxacin.
Abemaciclib Abemaciclib The metabolism of Tamoxifen can be increased when combined with Abemaciclib.
Betrixaban Betrixaban The serum concentration of Betrixaban can be increased when it is combined with Tamoxifen.
Acalabrutinib Acalabrutinib The metabolism of Tamoxifen can be increased when combined with Acalabrutinib.
Letermovir Letermovir The metabolism of Letermovir can be decreased when combined with Tamoxifen.
Tetrabenazine Tetrabenazine The metabolism of Tetrabenazine can be decreased when combined with Tamoxifen.
Ertugliflozin Ertugliflozin The serum concentration of Ertugliflozin can be increased when it is combined with Tamoxifen.
Buprenorphine Injection Buprenorphine Injection The metabolism of Tamoxifen can be decreased when combined with Buprenorphine.
Apalutamide Apalutamide The serum concentration of Tamoxifen can be increased when it is combined with Apalutamide.
Fostamatinib Fostamatinib The metabolism of Tamoxifen can be decreased when combined with Fostamatinib.
Avatrombopag Avatrombopag The metabolism of Avatrombopag can be increased when combined with Tamoxifen.
Baricitinib Baricitinib The metabolism of Baricitinib can be increased when combined with Tamoxifen.
Lofexidine Lofexidine The metabolism of Lofexidine can be decreased when combined with Tamoxifen.
Eliglustat Eliglustat The metabolism of Eliglustat can be decreased when combined with Tamoxifen.
Encorafenib Encorafenib The metabolism of Tamoxifen can be decreased when combined with Encorafenib.
Binimetinib Binimetinib The serum concentration of Binimetinib can be increased when it is combined with Tamoxifen.
Ivosidenib Ivosidenib The metabolism of Ivosidenib can be increased when combined with Tamoxifen.
Lusutrombopag Lusutrombopag The serum concentration of Lusutrombopag can be increased when it is combined with Tamoxifen.
Elagolix Elagolix The metabolism of Elagolix can be decreased when combined with Tamoxifen.
Doravirine Doravirine The metabolism of Doravirine can be decreased when combined with Tamoxifen.
Tafenoquine Tafenoquine The metabolism of Tafenoquine can be decreased when combined with Tamoxifen.
Cannabidiol Cannabidiol The metabolism of Tamoxifen can be decreased when combined with Cannabidiol.
Dacomitinib Dacomitinib The serum concentration of Tamoxifen can be increased when it is combined with Dacomitinib.
Duvelisib Duvelisib The metabolism of Duvelisib can be decreased when combined with Tamoxifen.
Omadacycline Omadacycline The serum concentration of Omadacycline can be increased when it is combined with Tamoxifen.
Stiripentol Stiripentol The metabolism of Tamoxifen can be decreased when combined with Stiripentol.
Talazoparib Talazoparib The serum concentration of Talazoparib can be increased when it is combined with Tamoxifen.
Gilteritinib Gilteritinib The metabolism of Tamoxifen can be decreased when combined with Gilteritinib.
Glasdegib Glasdegib The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Glasdegib.
Lorlatinib Lorlatinib The metabolism of Lorlatinib can be increased when combined with Tamoxifen.
Larotrectinib Larotrectinib The serum concentration of Larotrectinib can be increased when it is combined with Tamoxifen.
Methoxy Polyethylene Glycol-Epoetin Beta Injection Methoxy Polyethylene Glycol-Epoetin Beta Injection The risk or severity of Thrombosis can be increased when Methoxy polyethylene glycol-epoetin beta is combined with Tamoxifen.
Paclitaxel (with albumin) Injection Paclitaxel (with albumin) Injection The metabolism of Paclitaxel can be increased when combined with Tamoxifen.
Rifamycin Rifamycin The metabolism of Rifamycin can be increased when combined with Tamoxifen.
Prucalopride Prucalopride The serum concentration of Prucalopride can be increased when it is combined with Tamoxifen.
Emapalumab-lzsg Injection Emapalumab-lzsg Injection The metabolism of Tamoxifen can be increased when combined with Emapalumab.
Siponimod Siponimod The metabolism of Siponimod can be decreased when combined with Tamoxifen.
Acyclovir Ophthalmic Acyclovir Ophthalmic The metabolism of Acyclovir can be decreased when combined with Tamoxifen.
Erdafitinib Erdafitinib The metabolism of Erdafitinib can be increased when combined with Tamoxifen.
Esomeprazole Injection Esomeprazole Injection The metabolism of Tamoxifen can be decreased when combined with Esomeprazole.
Alpelisib Alpelisib The serum concentration of Tamoxifen can be decreased when it is combined with Alpelisib.
Cladribine Cladribine The risk or severity of cardiotoxicity can be increased when Cladribine is combined with Tamoxifen.
Darolutamide Darolutamide The serum concentration of Tamoxifen can be increased when it is combined with Darolutamide.
Triclabendazole Triclabendazole The metabolism of Tamoxifen can be decreased when combined with Triclabendazole.
Entrectinib Entrectinib The metabolism of Entrectinib can be increased when combined with Tamoxifen.
Pexidartinib Pexidartinib The metabolism of Pexidartinib can be increased when combined with Tamoxifen.
Istradefylline Istradefylline The metabolism of Istradefylline can be decreased when combined with Tamoxifen.
Pitolisant Pitolisant The serum concentration of Tamoxifen can be decreased when it is combined with Pitolisant.
Fedratinib Fedratinib The metabolism of Tamoxifen can be decreased when combined with Fedratinib.
Lefamulin Lefamulin Tamoxifen may increase the QTc-prolonging activities of Lefamulin.
Phenytoin Injection Phenytoin Injection The metabolism of Phenytoin can be decreased when combined with Tamoxifen.
Fosphenytoin Injection Fosphenytoin Injection The metabolism of Fosphenytoin can be decreased when combined with Tamoxifen.
Enfortumab vedotin-ejfv Injection Enfortumab vedotin-ejfv Injection The serum concentration of Enfortumab vedotin can be increased when it is combined with Tamoxifen.
Zanubrutinib Zanubrutinib The metabolism of Zanubrutinib can be increased when combined with Tamoxifen.
Voxelotor Voxelotor The serum concentration of Voxelotor can be increased when it is combined with Tamoxifen.
Avapritinib Avapritinib The metabolism of Avapritinib can be decreased when combined with Tamoxifen.
Lumateperone Lumateperone The serum concentration of Lumateperone can be decreased when it is combined with Tamoxifen.
Lasmiditan Lasmiditan The serum concentration of Tamoxifen can be increased when it is combined with Lasmiditan.
Ubrogepant Ubrogepant The serum concentration of Ubrogepant can be increased when it is combined with Tamoxifen.
Tazemetostat Tazemetostat The metabolism of Tazemetostat can be decreased when combined with Tamoxifen.
Cenobamate Cenobamate The serum concentration of Tamoxifen can be decreased when it is combined with Cenobamate.
Ozanimod Ozanimod The metabolism of Ozanimod can be decreased when combined with Tamoxifen.
Selumetinib Selumetinib The metabolism of Selumetinib can be decreased when combined with Tamoxifen.
Rimegepant Rimegepant The metabolism of Rimegepant can be increased when combined with Tamoxifen.
Tucatinib Tucatinib The metabolism of Tucatinib can be decreased when combined with Tamoxifen.
Remdesivir Injection Remdesivir Injection The serum concentration of Remdesivir can be increased when it is combined with Tamoxifen.
Ripretinib Ripretinib Ripretinib may decrease the excretion rate of Tamoxifen which could result in a higher serum level.
Selpercatinib Selpercatinib The serum concentration of Selpercatinib can be decreased when it is combined with Tamoxifen.
Capmatinib Capmatinib The serum concentration of Capmatinib can be decreased when it is combined with Tamoxifen.
Lemborexant Lemborexant The serum concentration of Lemborexant can be decreased when it is combined with Tamoxifen.
Fenfluramine Fenfluramine The metabolism of Tamoxifen can be decreased when combined with Fenfluramine.
Fostemsavir Fostemsavir Fostemsavir may decrease the excretion rate of Tamoxifen which could result in a higher serum level.
Octreotide Octreotide The serum concentration of Tamoxifen can be increased when it is combined with Octreotide.
Belantamab Mafodotin-blmf Injection Belantamab Mafodotin-blmf Injection Tamoxifen may decrease the excretion rate of Belantamab mafodotin which could result in a higher serum level.
Pralsetinib Pralsetinib The serum concentration of Tamoxifen can be increased when it is combined with Pralsetinib.
Opicapone Opicapone The metabolism of Tamoxifen can be increased when combined with Opicapone.
Satralizumab-mwge Injection Satralizumab-mwge Injection The serum concentration of Tamoxifen can be decreased when it is combined with Satralizumab.
Relugolix Relugolix The serum concentration of Relugolix can be increased when it is combined with Tamoxifen.
Progestin-Only (drospirenone) Oral Contraceptives Progestin-Only (drospirenone) Oral Contraceptives The metabolism of Drospirenone can be decreased when combined with Tamoxifen.
Viloxazine Viloxazine The metabolism of Tamoxifen can be decreased when combined with Viloxazine.
Vitamin E (Alpha-Tocopherol) Vitamin E (Alpha-Tocopherol) The metabolism of Tamoxifen can be increased when combined with Vitamin E.
Theophylline Theophylline The metabolism of Theophylline can be increased when combined with Tamoxifen.
Indomethacin Indomethacin The metabolism of Indomethacin can be decreased when combined with Tamoxifen.
Mefenamic Acid Mefenamic Acid The metabolism of Mefenamic acid can be decreased when combined with Tamoxifen.
Naproxen Naproxen The metabolism of Naproxen can be decreased when combined with Tamoxifen.
Trazodone Trazodone The risk or severity of QTc prolongation can be increased when Trazodone is combined with Tamoxifen.
Hydroxyurea Hydroxyurea The metabolism of Tamoxifen can be decreased when combined with Hydroxyurea.
Floxuridine Floxuridine The metabolism of Tamoxifen can be decreased when combined with Floxuridine.
Phenobarbital Phenobarbital The metabolism of Phenobarbital can be increased when combined with Tamoxifen.
Methotrexate Injection Methotrexate Injection The metabolism of Tamoxifen can be decreased when combined with Methotrexate.
Primidone Primidone The metabolism of Primidone can be increased when combined with Tamoxifen.
Methsuximide Methsuximide The metabolism of Tamoxifen can be decreased when combined with Methsuximide.
Chlorpromazine Chlorpromazine The metabolism of Tamoxifen can be decreased when combined with Chlorpromazine.
Diazepam Diazepam The metabolism of Diazepam can be decreased when combined with Tamoxifen.
Flurazepam Flurazepam The metabolism of Tamoxifen can be decreased when combined with Flurazepam.
Lorazepam Lorazepam The metabolism of Lorazepam can be decreased when combined with Tamoxifen.
Carmustine Carmustine The risk or severity of cardiotoxicity can be increased when Carmustine is combined with Tamoxifen.
Amantadine Amantadine The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Amantadine.
Codeine Codeine The metabolism of Codeine can be decreased when combined with Tamoxifen.
Bromocriptine Bromocriptine The metabolism of Tamoxifen can be decreased when combined with Bromocriptine.
Tranylcypromine Tranylcypromine The metabolism of Tamoxifen can be decreased when combined with Tranylcypromine.
Phenelzine Phenelzine The metabolism of Tamoxifen can be decreased when combined with Phenelzine.
Tetracycline Tetracycline The metabolism of Tamoxifen can be decreased when combined with Tetracycline.
Prochlorperazine Prochlorperazine The metabolism of Prochlorperazine can be decreased when combined with Tamoxifen.
Thioridazine Thioridazine The metabolism of Tamoxifen can be decreased when combined with Thioridazine.
Trifluoperazine Trifluoperazine The metabolism of Trifluoperazine can be decreased when combined with Tamoxifen.
Bleomycin Bleomycin The risk or severity of cardiotoxicity can be increased when Bleomycin is combined with Tamoxifen.
Dapsone Dapsone The metabolism of Dapsone can be decreased when combined with Tamoxifen.
Sulfadiazine Sulfadiazine The metabolism of Sulfadiazine can be decreased when combined with Tamoxifen.
Oxycodone Oxycodone The metabolism of Tamoxifen can be decreased when combined with Oxycodone.
Methadone Methadone The metabolism of Tamoxifen can be increased when combined with Methadone.
Oxybutynin Oxybutynin The metabolism of Oxybutynin can be decreased when combined with Tamoxifen.
Benztropine Benztropine The metabolism of Benzatropine can be decreased when combined with Tamoxifen.
Maprotiline Maprotiline The metabolism of Maprotiline can be decreased when combined with Tamoxifen.
Ibuprofen Ibuprofen The metabolism of Ibuprofen can be decreased when combined with Tamoxifen.
Orphenadrine Orphenadrine The metabolism of Tamoxifen can be decreased when combined with Orphenadrine.
Perphenazine Perphenazine The metabolism of Perphenazine can be decreased when combined with Tamoxifen.
Azathioprine Azathioprine The metabolism of Azathioprine can be decreased when combined with Tamoxifen.
Fluphenazine Fluphenazine The metabolism of Tamoxifen can be decreased when combined with Fluphenazine.
Phentermine Phentermine The metabolism of Phentermine can be decreased when combined with Tamoxifen.
Amoxapine Amoxapine The metabolism of Tamoxifen can be decreased when combined with Amoxapine.
Sulfasalazine Sulfasalazine Sulfasalazine may decrease the excretion rate of Tamoxifen which could result in a higher serum level.
Hydrocortisone Hydrocortisone The metabolism of Hydrocortisone can be increased when combined with Tamoxifen.
Doxorubicin Doxorubicin The serum concentration of Doxorubicin can be increased when it is combined with Tamoxifen.
Mechlorethamine Mechlorethamine The risk or severity of cardiotoxicity can be increased when Tamoxifen is combined with Mechlorethamine.
Dactinomycin Dactinomycin The serum concentration of Dactinomycin can be increased when it is combined with Tamoxifen.
Carbamazepine Carbamazepine The metabolism of Carbamazepine can be increased when combined with Tamoxifen.
Clonidine Clonidine The metabolism of Tamoxifen can be decreased when combined with Clonidine.
Hydralazine Hydralazine The metabolism of Tamoxifen can be decreased when combined with Hydralazine.
Cimetidine Cimetidine The metabolism of Tamoxifen can be decreased when combined with Cimetidine.
Warfarin Warfarin The risk or severity of bleeding can be increased when Tamoxifen is combined with Warfarin.
Clonazepam Clonazepam The metabolism of Clonazepam can be increased when combined with Tamoxifen.
Loperamide Loperamide The metabolism of Loperamide can be decreased when combined with Tamoxifen.
Promethazine Promethazine The metabolism of Tamoxifen can be decreased when combined with Promethazine.
Meclofenamate Meclofenamate The therapeutic efficacy of Meclofenamic acid can be decreased when used in combination with Tamoxifen.
Daunorubicin Daunorubicin The metabolism of Daunorubicin can be decreased when combined with Tamoxifen.
Nitrofurantoin Nitrofurantoin The therapeutic efficacy of Nitrofurantoin can be decreased when used in combination with Tamoxifen.
Griseofulvin Griseofulvin The metabolism of Tamoxifen can be increased when combined with Griseofulvin.
Digoxin Digoxin Tamoxifen may decrease the excretion rate of Digoxin which could result in a higher serum level.
Chloroquine Chloroquine The metabolism of Chloroquine can be decreased when combined with Tamoxifen.
Quinine Quinine The metabolism of Quinine can be decreased when combined with Tamoxifen.
Ethosuximide Ethosuximide The metabolism of Tamoxifen can be decreased when combined with Ethosuximide.
Calcitriol Calcitriol The metabolism of Tamoxifen can be increased when combined with Calcitriol.
Triamterene Triamterene The metabolism of Tamoxifen can be decreased when combined with Triamterene.
Sulfinpyrazone Sulfinpyrazone The metabolism of Sulfinpyrazone can be increased when combined with Tamoxifen.
Isosorbide Isosorbide The metabolism of Isosorbide can be increased when combined with Tamoxifen.
Clindamycin Injection Clindamycin Injection The metabolism of Clindamycin can be increased when combined with Tamoxifen.
Secobarbital Secobarbital The metabolism of Tamoxifen can be increased when combined with Secobarbital.
Desipramine Desipramine The metabolism of Desipramine can be decreased when combined with Tamoxifen.
Amitriptyline Amitriptyline The metabolism of Amitriptyline can be decreased when combined with Tamoxifen.
Imipramine Imipramine The metabolism of Imipramine can be decreased when combined with Tamoxifen.
Probenecid Probenecid The metabolism of Tamoxifen can be increased when combined with Probenecid.
Quinidine Quinidine The metabolism of Quinidine can be increased when combined with Tamoxifen.
Procainamide Procainamide The metabolism of Procainamide can be decreased when combined with Tamoxifen.
Isoniazid Isoniazid The metabolism of Tamoxifen can be decreased when combined with Isoniazid.
Rifampin Rifampin The serum concentration of Rifampicin can be decreased when it is combined with Tamoxifen.
Disopyramide Disopyramide The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Disopyramide.
Valproic Acid Valproic Acid The metabolism of Valproic acid can be decreased when combined with Tamoxifen.
Mitomycin Mitomycin The risk or severity of cardiotoxicity can be increased when Mitomycin is combined with Tamoxifen.
Levothyroxine Levothyroxine The therapeutic efficacy of Levothyroxine can be decreased when used in combination with Tamoxifen.
Liothyronine Liothyronine The therapeutic efficacy of Liothyronine can be decreased when used in combination with Tamoxifen.
Methimazole Methimazole The metabolism of Tamoxifen can be decreased when combined with Methimazole.
Chlorpropamide Chlorpropamide The metabolism of Chlorpropamide can be decreased when combined with Tamoxifen.
Tolbutamide Tolbutamide The metabolism of Tolbutamide can be decreased when combined with Tamoxifen.
Tolazamide Tolazamide The metabolism of Tolazamide can be decreased when combined with Tamoxifen.
Dextromethorphan Dextromethorphan The metabolism of Tamoxifen can be decreased when combined with Dextromethorphan.
Cyclobenzaprine Cyclobenzaprine The metabolism of Cyclobenzaprine can be decreased when combined with Tamoxifen.
Niacin Niacin The metabolism of Tamoxifen can be decreased when combined with Niacin.
Doxylamine Doxylamine The risk or severity of QTc prolongation can be increased when Doxylamine is combined with Tamoxifen.
Cyproheptadine Cyproheptadine The risk or severity of QTc prolongation can be increased when Cyproheptadine is combined with Tamoxifen.
Clemastine Clemastine The metabolism of Clemastine can be decreased when combined with Tamoxifen.
Chlorpheniramine Chlorpheniramine The metabolism of Chlorpheniramine can be decreased when combined with Tamoxifen.
Brompheniramine Brompheniramine The risk or severity of QTc prolongation can be increased when Dexbrompheniramine is combined with Tamoxifen.
Meclizine Meclizine The metabolism of Meclizine can be decreased when combined with Tamoxifen.
Hydrochlorothiazide Hydrochlorothiazide The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Hydrochlorothiazide.
Dantrolene Dantrolene The therapeutic efficacy of Dantrolene can be decreased when used in combination with Tamoxifen.
Chlorzoxazone Chlorzoxazone The metabolism of Chlorzoxazone can be decreased when combined with Tamoxifen.
Carisoprodol Carisoprodol The metabolism of Tamoxifen can be decreased when combined with Carisoprodol.
Danazol Danazol The metabolism of Tamoxifen can be decreased when combined with Danazol.
Disulfiram Disulfiram The metabolism of Disulfiram can be decreased when combined with Tamoxifen.
Propranolol (Cardiovascular) Propranolol (Cardiovascular) The metabolism of Tamoxifen can be decreased when combined with Propranolol.
Nortriptyline Nortriptyline The serum concentration of Tamoxifen can be increased when it is combined with Nortriptyline.
Spironolactone Spironolactone Tamoxifen may decrease the excretion rate of Spironolactone which could result in a higher serum level.
Amphotericin B Injection Amphotericin B Injection The metabolism of Tamoxifen can be decreased when combined with Amphotericin B.
Nadolol Nadolol The metabolism of Nadolol can be decreased when combined with Tamoxifen.
Oxytocin Injection Oxytocin Injection The risk or severity of QTc prolongation can be increased when Oxytocin is combined with Tamoxifen.
Clomiphene Clomiphene The serum concentration of Clomifene can be increased when it is combined with Tamoxifen.
Papaverine Papaverine The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Papaverine.
Fluorouracil Injection Fluorouracil Injection The metabolism of Fluorouracil can be decreased when combined with Tamoxifen.
Colchicine Colchicine The metabolism of Colchicine can be decreased when combined with Tamoxifen.
Cefaclor Cefaclor Tamoxifen may decrease the excretion rate of Cefaclor which could result in a higher serum level.
Cephalexin Cephalexin The metabolism of Cephalexin can be decreased when combined with Tamoxifen.
Dacarbazine Dacarbazine The metabolism of Dacarbazine can be decreased when combined with Tamoxifen.
Acetazolamide Acetazolamide The metabolism of Tamoxifen can be decreased when combined with Acetazolamide.
Ketoconazole Ketoconazole The metabolism of Ketoconazole can be decreased when combined with Tamoxifen.
Thiotepa Injection Thiotepa Injection The metabolism of Tamoxifen can be increased when combined with Thiotepa.
Vincristine Injection Vincristine Injection The excretion of Vincristine can be decreased when combined with Tamoxifen.
Dipyridamole Dipyridamole The risk or severity of bleeding can be increased when Tamoxifen is combined with Dipyridamole.
Vinblastine Vinblastine The metabolism of Tamoxifen can be increased when combined with Vinblastine.
Metoprolol Metoprolol The metabolism of Metoprolol can be decreased when combined with Tamoxifen.
Hydroxyzine Hydroxyzine The risk or severity of QTc prolongation can be increased when Hydroxyzine is combined with Tamoxifen.
Thiothixene Thiothixene The metabolism of Thiothixene can be decreased when combined with Tamoxifen.
Aspirin Aspirin The risk or severity of bleeding can be increased when Tamoxifen is combined with Acetylsalicylic acid.
Alprazolam Alprazolam The metabolism of Alprazolam can be decreased when combined with Tamoxifen.
Triazolam Triazolam The metabolism of Triazolam can be decreased when combined with Tamoxifen.
Hyoscyamine Hyoscyamine The risk or severity of QTc prolongation can be increased when Hyoscyamine is combined with Tamoxifen.
Trimethoprim Trimethoprim The metabolism of Trimethoprim can be decreased when combined with Tamoxifen.
Diltiazem Diltiazem The metabolism of Tamoxifen can be decreased when combined with Diltiazem.
Nifedipine Nifedipine The metabolism of Nifedipine can be increased when combined with Tamoxifen.
Timolol Timolol The metabolism of Timolol can be decreased when combined with Tamoxifen.
Verapamil Verapamil The metabolism of Tamoxifen can be decreased when combined with Verapamil.
Atenolol Atenolol The metabolism of Atenolol can be decreased when combined with Tamoxifen.
Pindolol Pindolol The metabolism of Pindolol can be decreased when combined with Tamoxifen.
Cisplatin Injection Cisplatin Injection The metabolism of Tamoxifen can be decreased when combined with Cisplatin.
Piroxicam Piroxicam The metabolism of Piroxicam can be decreased when combined with Tamoxifen.
Streptozocin Streptozocin The metabolism of Tamoxifen can be increased when combined with Streptozocin.
Etoposide Etoposide The serum concentration of Etoposide can be increased when it is combined with Tamoxifen.
Glyburide Glyburide The metabolism of Glyburide can be decreased when combined with Tamoxifen.
Glipizide Glipizide The metabolism of Glipizide can be decreased when combined with Tamoxifen.
Indapamide Indapamide The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Indapamide.
Dicloxacillin Dicloxacillin The metabolism of Tamoxifen can be increased when combined with Dicloxacillin.
Nafcillin Injection Nafcillin Injection The metabolism of Tamoxifen can be increased when combined with Nafcillin.
Pentoxifylline Pentoxifylline The metabolism of Pentoxifylline can be decreased when combined with Tamoxifen.
Pentamidine Injection Pentamidine Injection The metabolism of Pentamidine can be decreased when combined with Tamoxifen.
Labetalol Labetalol The metabolism of Tamoxifen can be decreased when combined with Labetalol.
Leuprolide Injection Leuprolide Injection The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Leuprolide.
Gemfibrozil Gemfibrozil The metabolism of Tamoxifen can be decreased when combined with Gemfibrozil.
Guanabenz Guanabenz The metabolism of Tamoxifen can be decreased when combined with Guanabenz.
Pimozide Pimozide The metabolism of Pimozide can be increased when combined with Tamoxifen.
Flurbiprofen Flurbiprofen The metabolism of Flurbiprofen can be decreased when combined with Tamoxifen.
Amiodarone Amiodarone The metabolism of Amiodarone can be increased when combined with Tamoxifen.
Buspirone Buspirone The metabolism of Buspirone can be decreased when combined with Tamoxifen.
Lovastatin Lovastatin The metabolism of Lovastatin can be decreased when combined with Tamoxifen.
Ciprofloxacin Ciprofloxacin The metabolism of Ciprofloxacin can be decreased when combined with Tamoxifen.
Diclofenac Diclofenac The metabolism of Diclofenac can be decreased when combined with Tamoxifen.
Fluoxetine Fluoxetine The serum concentration of Tamoxifen can be increased when it is combined with Fluoxetine.
Nimodipine Nimodipine The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Nimodipine.
Interferon Alfa-2b Injection Interferon Alfa-2b Injection The metabolism of Tamoxifen can be decreased when combined with Interferon alfa-2b.
Clozapine Clozapine The metabolism of Clozapine can be decreased when combined with Tamoxifen.
Idarubicin Idarubicin The metabolism of Idarubicin can be decreased when combined with Tamoxifen.
Ofloxacin Ofloxacin The metabolism of Ofloxacin can be decreased when combined with Tamoxifen.
Fludarabine Injection Fludarabine Injection The risk or severity of cardiotoxicity can be increased when Tamoxifen is combined with Fludarabine.
Pentostatin Injection Pentostatin Injection The risk or severity of cardiotoxicity can be increased when Pentostatin is combined with Tamoxifen.
Clarithromycin Clarithromycin The metabolism of Tamoxifen can be decreased when combined with Clarithromycin.
Etodolac Etodolac The metabolism of Etodolac can be decreased when combined with Tamoxifen.
Felodipine Felodipine The metabolism of Felodipine can be decreased when combined with Tamoxifen.
Nabumetone Nabumetone The metabolism of Nabumetone can be decreased when combined with Tamoxifen.
Pravastatin Pravastatin Tamoxifen may decrease the excretion rate of Pravastatin which could result in a higher serum level.
Simvastatin Simvastatin The metabolism of Tamoxifen can be increased when combined with Simvastatin.
Epoetin Alfa, Injection Epoetin Alfa, Injection The risk or severity of Thrombosis can be increased when Erythropoietin is combined with Tamoxifen.
Amlodipine Amlodipine The metabolism of Amlodipine can be increased when combined with Tamoxifen.
Teniposide Injection Teniposide Injection The metabolism of Tamoxifen can be increased when combined with Teniposide.
Itraconazole Itraconazole The metabolism of Tamoxifen can be decreased when combined with Itraconazole.
Atovaquone Atovaquone The metabolism of Tamoxifen can be decreased when combined with Atovaquone.
Rifabutin Rifabutin The metabolism of Tamoxifen can be increased when combined with Rifabutin.
Sotalol Sotalol The metabolism of Sotalol can be decreased when combined with Tamoxifen.
Bisoprolol Bisoprolol The serum concentration of Bisoprolol can be increased when it is combined with Tamoxifen.
Zolpidem Zolpidem The metabolism of Zolpidem can be increased when combined with Tamoxifen.
Doxazosin Doxazosin The metabolism of Doxazosin can be decreased when combined with Tamoxifen.
Isradipine Isradipine The metabolism of Isradipine can be decreased when combined with Tamoxifen.
Omeprazole Omeprazole The metabolism of Tamoxifen can be increased when combined with Omeprazole.
Cisapride Cisapride The metabolism of Tamoxifen can be decreased when combined with Cisapride.
Fluvastatin Fluvastatin The metabolism of Fluvastatin can be decreased when combined with Tamoxifen.
Venlafaxine Venlafaxine The metabolism of Tamoxifen can be decreased when combined with Venlafaxine.
Famciclovir Famciclovir The metabolism of Famciclovir can be decreased when combined with Tamoxifen.
Fluvoxamine Fluvoxamine The metabolism of Tamoxifen can be decreased when combined with Fluvoxamine.
Nefazodone Nefazodone The metabolism of Nefazodone can be decreased when combined with Tamoxifen.
Lamotrigine Lamotrigine The risk or severity of QTc prolongation can be increased when Lamotrigine is combined with Tamoxifen.
Losartan Losartan The metabolism of Losartan can be decreased when combined with Tamoxifen.
Tramadol Tramadol The metabolism of Tramadol can be decreased when combined with Tamoxifen.
Vinorelbine Injection Vinorelbine Injection The metabolism of Tamoxifen can be increased when combined with Vinorelbine.
Moexipril Moexipril The risk or severity of QTc prolongation can be increased when Tamoxifen is combined with Moexipril.
Lansoprazole Lansoprazole The metabolism of Tamoxifen can be increased when combined with Lansoprazole.
Ifosfamide Injection Ifosfamide Injection The metabolism of Ifosfamide can be increased when combined with Tamoxifen.
Nicardipine Nicardipine The metabolism of Tamoxifen can be decreased when combined with Nicardipine.
Bupropion Bupropion The serum concentration of Bupropion can be increased when it is combined with Tamoxifen.
Ticlopidine Ticlopidine The metabolism of Tamoxifen can be decreased when combined with Ticlopidine.
Saquinavir Saquinavir The metabolism of Tamoxifen can be decreased when combined with Saquinavir.
Dalteparin Injection Dalteparin Injection The risk or severity of bleeding can be increased when Tamoxifen is combined with Dalteparin.
Nisoldipine Nisoldipine The metabolism of Tamoxifen can be decreased when combined with Nisoldipine.
Riluzole Riluzole The metabolism of Riluzole can be decreased when combined with Tamoxifen.
Glimepiride Glimepiride The metabolism of Glimepiride can be decreased when combined with Tamoxifen.
Anastrozole Anastrozole The serum concentration of Anastrozole can be decreased when it is combined with Tamoxifen.
Gemcitabine Injection Gemcitabine Injection The serum concentration of Gemcitabine can be increased when it is combined with Tamoxifen.
Indinavir Indinavir The metabolism of Tamoxifen can be decreased when combined with Indinavir.
Ritonavir Ritonavir The serum concentration of Tamoxifen can be increased when it is combined with Ritonavir.
Docetaxel Injection Docetaxel Injection The metabolism of Docetaxel can be increased when combined with Tamoxifen.
Clomipramine Clomipramine The metabolism of Tamoxifen can be decreased when combined with Clomipramine.
Zafirlukast Zafirlukast The metabolism of Tamoxifen can be decreased when combined with Zafirlukast.
Mirtazapine Mirtazapine The metabolism of Mirtazapine can be decreased when combined with Tamoxifen.
Topiramate Topiramate The metabolism of Tamoxifen can be increased when combined with Topiramate.
Zileuton Zileuton The metabolism of Zileuton can be decreased when combined with Tamoxifen.
Valsartan Valsartan The metabolism of Tamoxifen can be decreased when combined with Valsartan.
Insulin Lispro Injection Insulin Lispro Injection The metabolism of Tamoxifen can be increased when combined with Insulin lispro.
Donepezil Donepezil The metabolism of Donepezil can be decreased when combined with Tamoxifen.
Nelfinavir Nelfinavir The metabolism of Nelfinavir can be decreased when combined with Tamoxifen.
Fexofenadine Fexofenadine The serum concentration of Fexofenadine can be increased when it is combined with Tamoxifen.
Azithromycin Azithromycin The metabolism of Azithromycin can be decreased when combined with Tamoxifen.
Loratadine Loratadine Tamoxifen may decrease the excretion rate of Loratadine which could result in a higher serum level.
Carvedilol Carvedilol The metabolism of Carvedilol can be decreased when combined with Tamoxifen.
Nilutamide Nilutamide The metabolism of Tamoxifen can be decreased when combined with Nilutamide.
Flutamide Flutamide The metabolism of Tamoxifen can be decreased when combined with Flutamide.
Selegiline Selegiline The metabolism of Selegiline can be decreased when combined with Tamoxifen.
Bicalutamide Bicalutamide The metabolism of Tamoxifen can be decreased when combined with Bicalutamide.
Sertraline Sertraline The metabolism of Tamoxifen can be decreased when combined with Sertraline.
Propafenone Propafenone The metabolism of Tamoxifen can be decreased when combined with Propafenone.
Letrozole Letrozole The serum concentration of Letrozole can be decreased when it is combined with Tamoxifen.
Raloxifene Raloxifene The metabolism of Tamoxifen can be decreased when combined with Raloxifene.
Irbesartan Irbesartan The metabolism of Irbesartan can be decreased when combined with Tamoxifen.
Tamsulosin Tamsulosin The metabolism of Tamsulosin can be decreased when combined with Tamoxifen.
Finasteride Finasteride The metabolism of Finasteride can be decreased when combined with Tamoxifen.
Quetiapine Quetiapine The metabolism of Quetiapine can be decreased when combined with Tamoxifen.
Cetirizine Cetirizine The risk or severity of QTc prolongation can be increased when Cetirizine is combined with Tamoxifen.
Paroxetine Paroxetine The therapeutic efficacy of Tamoxifen can be decreased when used in combination with Paroxetine.
Tolcapone Tolcapone The metabolism of Tamoxifen can be decreased when combined with Tolcapone.
Citalopram Citalopram The metabolism of Citalopram can be decreased when combined with Tamoxifen.
Capecitabine Capecitabine The metabolism of Tamoxifen can be decreased when combined with Capecitabine.
Efavirenz Efavirenz The metabolism of Tamoxifen can be increased when combined with Efavirenz.
Sildenafil Sildenafil The metabolism of Tamoxifen can be decreased when combined with Sildenafil.
Pioglitazone Pioglitazone The metabolism of Pioglitazone can be decreased when combined with Tamoxifen.
Trastuzumab Injection Trastuzumab Injection The risk or severity of cardiotoxicity can be increased when Trastuzumab is combined with Tamoxifen.
Celecoxib Celecoxib The metabolism of Celecoxib can be decreased when combined with Tamoxifen.
Rosiglitazone Rosiglitazone The metabolism of Rosiglitazone can be decreased when combined with Tamoxifen.
Tolterodine Tolterodine The metabolism of Tolterodine can be decreased when combined with Tamoxifen.
Thalidomide Thalidomide The metabolism of Thalidomide can be decreased when combined with Tamoxifen.
Nateglinide Nateglinide The metabolism of Nateglinide can be decreased when combined with Tamoxifen.
Galantamine Galantamine The metabolism of Galantamine can be decreased when combined with Tamoxifen.
Rabeprazole Rabeprazole The metabolism of Tamoxifen can be decreased when combined with Rabeprazole.
Terbinafine Terbinafine The metabolism of Terbinafine can be decreased when combined with Tamoxifen.

Content provided by: AHFS® Patient Medication Information™. © Copyright, 2021. The American Society of Health-System Pharmacists

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