Famciclovir

Generic name: Pronounced as (fam sye' kloe veer)
Brand names
  • Famvir®
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Medical Content Reviewed By HelloPharmacist Staff

Last Revised - 12/15/2017

Famciclovir is used to treat herpes zoster (shingles; a rash that can occur in people who have had chickenpox in the past). It is also used to treat repeat outbreaks of herpes virus cold sores or fever blisters in people with a normal immune system. Famciclovir is used to treat repeat outbreaks and to prevent further outbreaks of genital herpes (a herpes virus infection that causes sores to form around the genitals and rectum from time to time) in people with a normal immune system. Famciclovir is also used to treat returning herpes simplex infections of the skin and mucus membranes (mouth, anus) in people with human immunodeficiency virus (HIV) infection. Famciclovir is in a class of medications called antivirals. It works by stopping the spread of the herpes virus in the body. Famciclovir does not cure herpes infections and may not stop the spread of herpes virus to other people. However, it may decrease the symptoms of pain, burning, tingling, tenderness, and itching; help sores to heal; and prevent new sores from forming.

Famciclovir comes as a tablet to take by mouth with or without food. When famciclovir is used to treat shingles, it is usually taken every 8 hours (three times a day) for 7 days, starting within 3 days after the rash begins to appear. When famciclovir is used to treat cold sores and fever blisters, it is usually taken as one dose at the earliest sign or symptom (tingling, itching, or burning) of a cold sore. When famciclovir is used to treat repeat outbreaks of genital herpes, it is usually taken twice a day for one day, starting within 6 hours of the first sign or symptom of the condition. To keep genital herpes from returning, famciclovir is usually taken twice a day for up to 1 year. When famciclovir is used to treat herpes infection in people infected with HIV, it is usually taken twice a day for 7 days. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take famciclovir exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor. Use this medication as soon as possible after symptoms appear.

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

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

Before taking famciclovir,

  • tell your doctor and pharmacist if you are allergic to famciclovir, penciclovir cream (Denavir), acyclovir (Zovirax), any other medications, or lactose.

  • tell your doctor and pharmacist what other prescription and nonprescription medications, vitamins, nutritional supplement, and herbal products you are taking or plan to take, especially probenecid (Benemid).

  • tell your doctor if you have or have ever had problems with your immune system, human immunodeficiency virus infection (HIV), or acquired immunodeficiency syndrome (AIDS); galactose intolerance or glucose-galactose malabsorption (inherited conditions where the body is not able to tolerate lactose); or kidney or liver disease.

  • tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking famciclovir, call your doctor.

  • you should know that famciclovir may make you drowsy, dizzy, confused, or disoriented. Do not drive a car or operate machinery until you know how this medication affects you.

Unless your doctor tells you otherwise, continue your normal diet.

Take the missed dose as soon as you remember it, and take any remaining doses for that day at evenly spaced intervals. 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.

  • Famciclovir may cause side effects. Tell your doctor if any of these symptoms or those listed in the SPECIAL PRECAUTIONS section above are severe or do not go away:

    • headache

    • nausea

    • vomiting

    • diarrhea or loose stools

    • gas

    • stomach pain

    • tiredness

    • rash

    • itching

    • painful menstrual periods

  • If you experience any of the following side effects, call your doctor immediately:

    • pain, burning, numbness, or tingling in the hands or feet

  • If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online (http://www.fda.gov/Safety/MedWatch) or by phone (1-800-332-1088).

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 and moisture (not in the bathroom).

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

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.

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.

Keep all appointments with your doctor and the laboratory. Your doctor may order certain lab tests to check your response to famciclovir.

Do not have sexual intercourse when you are having an outbreak of genital herpes. However, genital herpes can be spread to others, even when you do not have symptoms.

Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription. If you still have symptoms of infection after you finish the famciclovir, call your doctor.

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
Delavirdine Delavirdine The metabolism of Famciclovir can be decreased when combined with Delavirdine.
Aminophylline Aminophylline The metabolism of Aminophylline can be decreased when combined with Famciclovir.
Erythromycin and Sulfisoxazole Erythromycin and Sulfisoxazole The metabolism of Famciclovir can be decreased when combined with Erythromycin.
Fenofibrate Fenofibrate The metabolism of Fenofibrate can be decreased when combined with Famciclovir.
Methylergonovine Methylergonovine The metabolism of Famciclovir can be decreased when combined with Methylergometrine.
Tacrolimus Tacrolimus The metabolism of Tacrolimus can be decreased when combined with Famciclovir.
Triamcinolone Triamcinolone The metabolism of Famciclovir can be increased when combined with Triamcinolone.
Doxycycline Injection Doxycycline Injection The metabolism of Famciclovir can be decreased when combined with Doxycycline.
Fluconazole Injection Fluconazole Injection The metabolism of Famciclovir can be decreased when combined with Fluconazole.
Meperidine Injection Meperidine Injection The metabolism of Famciclovir can be increased when combined with Meperidine.
Methylprednisolone Injection Methylprednisolone Injection The metabolism of Famciclovir can be increased when combined with Methylprednisolone.
Metronidazole Injection Metronidazole Injection The metabolism of Famciclovir can be decreased when combined with Metronidazole.
Cyclosporine Cyclosporine The metabolism of Cyclosporine can be decreased when combined with Famciclovir.
Dofetilide Dofetilide The metabolism of Dofetilide can be decreased when combined with Famciclovir.
Orlistat Orlistat The metabolism of Famciclovir can be increased when combined with Orlistat.
Oxcarbazepine Oxcarbazepine The metabolism of Famciclovir can be increased when combined with Oxcarbazepine.
Anakinra Anakinra The metabolism of Famciclovir can be increased when combined with Anakinra.
Etanercept Injection Etanercept Injection The metabolism of Famciclovir can be increased when combined with Etanercept.
Modafinil Modafinil The metabolism of Famciclovir can be increased when combined with Modafinil.
Tenofovir Tenofovir The metabolism of Tenofovir can be decreased when combined with Famciclovir.
Sirolimus Sirolimus The metabolism of Sirolimus can be decreased when combined with Famciclovir.
Epinephrine Injection Epinephrine Injection The metabolism of Famciclovir can be decreased when combined with Epinephrine.
Adalimumab Injection Adalimumab Injection The metabolism of Famciclovir can be increased when combined with Adalimumab.
Atazanavir Atazanavir The metabolism of Famciclovir can be decreased when combined with Atazanavir.
Mefloquine Mefloquine The metabolism of Famciclovir can be decreased when combined with Mefloquine.
Rosuvastatin Rosuvastatin The metabolism of Rosuvastatin can be decreased when combined with Famciclovir.
Aprepitant Aprepitant The metabolism of Famciclovir can be decreased when combined with Aprepitant.
Progesterone Progesterone The metabolism of Famciclovir can be increased when combined with Progesterone.
Infliximab Injection Infliximab Injection The metabolism of Famciclovir can be increased when combined with Infliximab.
Rifaximin Rifaximin The metabolism of Famciclovir can be increased when combined with Rifaximin.
Duloxetine Duloxetine The metabolism of Duloxetine can be decreased when combined with Famciclovir.
Norethindrone Norethindrone The metabolism of Norethisterone can be decreased when combined with Famciclovir.
Bosentan Bosentan The metabolism of Famciclovir can be increased when combined with Bosentan.
Erlotinib Erlotinib The metabolism of Famciclovir can be decreased when combined with Erlotinib.
Voriconazole Voriconazole The metabolism of Famciclovir can be decreased when combined with Voriconazole.
Deferasirox Deferasirox The metabolism of Famciclovir can be increased when combined with Deferasirox.
Tipranavir Tipranavir The metabolism of Tipranavir can be decreased when combined with Famciclovir.
Felbamate Felbamate The metabolism of Famciclovir can be increased when combined with Felbamate.
Ranolazine Ranolazine The metabolism of Famciclovir can be decreased when combined with Ranolazine.
Abatacept Injection Abatacept Injection The metabolism of Famciclovir can be increased when combined with Abatacept.
Imatinib Imatinib The metabolism of Famciclovir can be decreased when combined with Imatinib.
Gefitinib Gefitinib The metabolism of Famciclovir can be decreased when combined with Gefitinib.
Bortezomib Bortezomib The metabolism of Bortezomib can be decreased when combined with Famciclovir.
Influenza Vaccine, Live Intranasal Influenza Vaccine, Live Intranasal The therapeutic efficacy of Typhoid Vaccine Live can be decreased when used in combination with Famciclovir.
Live Shingles (Zoster) Vaccine (ZVL) Live Shingles (Zoster) Vaccine (ZVL) The therapeutic efficacy of Varicella Zoster Vaccine (Live/attenuated) can be decreased when used in combination with Famciclovir.
Posaconazole Posaconazole The metabolism of Famciclovir can be decreased when combined with Posaconazole.
Primaquine Primaquine The metabolism of Famciclovir can be decreased when combined with Primaquine.
Darunavir Darunavir The metabolism of Darunavir can be decreased when combined with Famciclovir.
Sorafenib Sorafenib The metabolism of Famciclovir can be decreased when combined with Sorafenib.
Sunitinib Sunitinib The metabolism of Famciclovir can be decreased when combined with Sunitinib.
Lapatinib Lapatinib The metabolism of Lapatinib can be decreased when combined with Famciclovir.
Dasatinib Dasatinib The metabolism of Dasatinib can be decreased when combined with Famciclovir.
Armodafinil Armodafinil The metabolism of Famciclovir can be increased when combined with Armodafinil.
Ivermectin Ivermectin The metabolism of Famciclovir can be increased when combined with Ivermectin.
Temsirolimus Temsirolimus The metabolism of Temsirolimus can be decreased when combined with Famciclovir.
Nilotinib Nilotinib The metabolism of Famciclovir can be decreased when combined with Nilotinib.
Bexarotene Bexarotene The metabolism of Famciclovir can be increased when combined with Bexarotene.
Budesonide Budesonide The metabolism of Famciclovir can be increased when combined with Budesonide.
Chloramphenicol Injection Chloramphenicol Injection The metabolism of Famciclovir can be decreased when combined with Chloramphenicol.
Etravirine Etravirine The metabolism of Famciclovir can be increased when combined with Etravirine.
Mitoxantrone Injection Mitoxantrone Injection The metabolism of Famciclovir can be decreased when combined with Mitoxantrone.
Desvenlafaxine Desvenlafaxine The metabolism of Famciclovir can be decreased when combined with Desvenlafaxine.
Pilocarpine Pilocarpine The metabolism of Famciclovir can be decreased when combined with Pilocarpine.
Certolizumab Injection Certolizumab Injection The metabolism of Famciclovir can be increased when combined with Certolizumab pegol.
Ixabepilone Injection Ixabepilone Injection The metabolism of Ixabepilone can be decreased when combined with Famciclovir.
Irinotecan Injection Irinotecan Injection The metabolism of Irinotecan can be decreased when combined with Famciclovir.
Mitotane Mitotane The metabolism of Famciclovir can be increased when combined with Mitotane.
Rufinamide Rufinamide The metabolism of Famciclovir can be increased when combined with Rufinamide.
Midazolam Midazolam The metabolism of Famciclovir can be decreased when combined with Midazolam.
Milnacipran Milnacipran The metabolism of Famciclovir can be decreased when combined with Milnacipran.
Lacosamide Lacosamide The metabolism of Lacosamide can be decreased when combined with Famciclovir.
Everolimus Everolimus The metabolism of Everolimus can be decreased when combined with Famciclovir.
Tolvaptan (low blood sodium) Tolvaptan (low blood sodium) The metabolism of Tolvaptan can be decreased when combined with Famciclovir.
Dronedarone Dronedarone The metabolism of Dronedarone can be decreased when combined with Famciclovir.
Romidepsin Injection Romidepsin Injection The metabolism of Romidepsin can be decreased when combined with Famciclovir.
Topotecan Topotecan The metabolism of Famciclovir can be increased when combined with Topotecan.
Golimumab Injection Golimumab Injection The metabolism of Famciclovir can be increased when combined with Golimumab.
Pazopanib Pazopanib The metabolism of Pazopanib can be decreased when combined with Famciclovir.
Albendazole Albendazole The metabolism of Albendazole can be decreased when combined with Famciclovir.
Tocilizumab Injection Tocilizumab Injection The metabolism of Famciclovir can be increased when combined with Tocilizumab.
Cabazitaxel Injection Cabazitaxel Injection The metabolism of Cabazitaxel can be decreased when combined with Famciclovir.
Acetaminophen Injection Acetaminophen Injection The metabolism of Famciclovir can be increased when combined with Acetaminophen.
Denileukin Diftitox Injection Denileukin Diftitox Injection The metabolism of Famciclovir can be decreased when combined with Aldesleukin.
Busulfan Injection Busulfan Injection The metabolism of Busulfan can be decreased when combined with Famciclovir.
Roflumilast Roflumilast The metabolism of Roflumilast can be decreased when combined with Famciclovir.
Linagliptin Linagliptin The metabolism of Famciclovir can be decreased when combined with Linagliptin.
Rilpivirine Rilpivirine The metabolism of Famciclovir can be decreased when combined with Rilpivirine.
Telaprevir Telaprevir The metabolism of Famciclovir can be decreased when combined with Glecaprevir.
Cyclophosphamide Injection Cyclophosphamide Injection The metabolism of Famciclovir can be decreased when combined with Cyclophosphamide.
Ticagrelor Ticagrelor The metabolism of Famciclovir can be decreased when combined with Ticagrelor.
Brentuximab Vedotin Injection Brentuximab Vedotin Injection The metabolism of Famciclovir can be decreased when combined with Brentuximab vedotin.
Ruxolitinib Ruxolitinib The metabolism of Ruxolitinib can be decreased when combined with Famciclovir.
Vandetanib Vandetanib The metabolism of Vandetanib can be decreased when combined with Famciclovir.
Clobazam Clobazam The metabolism of Famciclovir can be increased when combined with Clobazam.
Vemurafenib Vemurafenib The metabolism of Famciclovir can be decreased when combined with Vemurafenib.
Ivacaftor Ivacaftor The metabolism of Ivacaftor can be decreased when combined with Famciclovir.
Axitinib Axitinib The metabolism of Axitinib can be decreased when combined with Famciclovir.
Crizotinib Crizotinib The metabolism of Famciclovir can be decreased when combined with Crizotinib.
Cabergoline Cabergoline The metabolism of Famciclovir can be decreased when combined with Cabergoline.
Naloxone Injection Naloxone Injection The metabolism of Famciclovir can be decreased when combined with Naloxone.
Enzalutamide Enzalutamide The metabolism of Famciclovir can be increased when combined with Enzalutamide.
Regorafenib Regorafenib The metabolism of Famciclovir can be decreased when combined with Regorafenib.
Bosutinib Bosutinib The metabolism of Famciclovir can be decreased when combined with Bosutinib.
Corticotropin, Repository Injection Corticotropin, Repository Injection The metabolism of Famciclovir can be increased when combined with Corticotropin.
Ponatinib Ponatinib The metabolism of Ponatinib can be decreased when combined with Famciclovir.
Pomalidomide Pomalidomide The metabolism of Pomalidomide can be decreased when combined with Famciclovir.
Ado-trastuzumab Emtansine Injection Ado-trastuzumab Emtansine Injection The metabolism of Famciclovir can be decreased when combined with Trastuzumab emtansine.
Dabrafenib Dabrafenib The metabolism of Famciclovir can be decreased when combined with Dabrafenib.
Trametinib Trametinib The metabolism of Famciclovir can be increased when combined with Trametinib.
Perampanel Perampanel The metabolism of Famciclovir can be increased when combined with Perampanel.
Lomitapide Lomitapide The metabolism of Famciclovir can be decreased when combined with Lomitapide.
Simeprevir Simeprevir The metabolism of Famciclovir can be decreased when combined with Simeprevir.
Apremilast Apremilast The metabolism of Famciclovir can be increased when combined with Apremilast.
Ceritinib Ceritinib The metabolism of Ceritinib can be decreased when combined with Famciclovir.
Siltuximab Injection Siltuximab Injection The metabolism of Famciclovir can be increased when combined with Siltuximab.
Eslicarbazepine Eslicarbazepine The metabolism of Famciclovir can be increased when combined with Eslicarbazepine.
Idelalisib Idelalisib The metabolism of Idelalisib can be decreased when combined with Famciclovir.
Testosterone Injection Testosterone Injection The metabolism of Famciclovir can be increased when combined with Testosterone.
Oritavancin Injection Oritavancin Injection The metabolism of Famciclovir can be increased when combined with Oritavancin.
Vorapaxar Vorapaxar The metabolism of Vorapaxar can be decreased when combined with Famciclovir.
Suvorexant Suvorexant The metabolism of Suvorexant can be decreased when combined with Famciclovir.
Olaparib Olaparib The metabolism of Olaparib can be decreased when combined with Famciclovir.
Tasimelteon Tasimelteon The metabolism of Tasimelteon can be decreased when combined with Famciclovir.
Lanreotide Injection Lanreotide Injection The metabolism of Famciclovir can be decreased when combined with Lanreotide.
Nintedanib Nintedanib The metabolism of Nintedanib can be decreased when combined with Famciclovir.
Secukinumab Injection Secukinumab Injection The metabolism of Famciclovir can be increased when combined with Secukinumab.
Palbociclib Palbociclib The metabolism of Palbociclib can be decreased when combined with Famciclovir.
Lenvatinib Lenvatinib The metabolism of Famciclovir can be increased when combined with Lenvatinib.
Panobinostat Panobinostat The metabolism of Panobinostat can be decreased when combined with Famciclovir.
Haloperidol Injection Haloperidol Injection The serum concentration of Famciclovir can be increased when it is combined with Haloperidol.
Isavuconazonium Injection Isavuconazonium Injection The metabolism of Famciclovir can be increased when combined with Isavuconazonium.
Sonidegib Sonidegib The metabolism of Sonidegib can be decreased when combined with Famciclovir.
Prednisolone Prednisolone The metabolism of Famciclovir can be increased when combined with Prednisolone.
Ziprasidone Injection Ziprasidone Injection The metabolism of Famciclovir can be decreased when combined with Ziprasidone.
Cobimetinib Cobimetinib The metabolism of Cobimetinib can be decreased when combined with Famciclovir.
Trabectedin Injection Trabectedin Injection The metabolism of Trabectedin can be decreased when combined with Famciclovir.
Osimertinib Osimertinib The metabolism of Famciclovir can be decreased when combined with Osimertinib.
Alectinib Alectinib The metabolism of Alectinib can be decreased when combined with Famciclovir.
Ixazomib Ixazomib The metabolism of Ixazomib can be decreased when combined with Famciclovir.
Rifapentine Rifapentine The metabolism of Famciclovir can be increased when combined with Rifapentine.
Lesinurad Lesinurad The metabolism of Famciclovir can be increased when combined with Lesinurad.
Amphotericin B Liposomal Injection Amphotericin B Liposomal Injection The metabolism of Famciclovir can be decreased when combined with Amphotericin B.
Dexamethasone Injection Dexamethasone Injection The metabolism of Famciclovir can be increased when combined with Dexamethasone.
Venetoclax Venetoclax The metabolism of Famciclovir can be decreased when combined with Venetoclax.
Cobicistat Cobicistat The metabolism of Famciclovir can be decreased when combined with Cobicistat.
Rucaparib Rucaparib The metabolism of Rucaparib can be decreased when combined with Famciclovir.
Ribociclib Ribociclib The metabolism of Famciclovir can be decreased when combined with Ribociclib.
Brigatinib Brigatinib The metabolism of Famciclovir can be decreased when combined with Brigatinib.
Deflazacort Deflazacort The metabolism of Famciclovir can be increased when combined with Deflazacort.
Sarilumab Injection Sarilumab Injection The metabolism of Famciclovir can be increased when combined with Sarilumab.
Midostaurin Midostaurin The metabolism of Famciclovir can be increased when combined with Midostaurin.
Neratinib Neratinib The metabolism of Neratinib can be decreased when combined with Famciclovir.
Enasidenib Enasidenib The metabolism of Famciclovir can be decreased when combined with Enasidenib.
Aprepitant/Fosaprepitant Injection Aprepitant/Fosaprepitant Injection The metabolism of Famciclovir can be increased when combined with Fosaprepitant.
Copanlisib Injection Copanlisib Injection The metabolism of Copanlisib can be decreased when combined with Famciclovir.
Abemaciclib Abemaciclib The metabolism of Abemaciclib can be decreased when combined with Famciclovir.
Acalabrutinib Acalabrutinib The metabolism of Famciclovir can be decreased when combined with Acalabrutinib.
Letermovir Letermovir The metabolism of Famciclovir can be decreased when combined with Letermovir.
Buprenorphine Injection Buprenorphine Injection The metabolism of Buprenorphine can be decreased when combined with Famciclovir.
Apalutamide Apalutamide The metabolism of Famciclovir can be increased when combined with Apalutamide.
Fostamatinib Fostamatinib The metabolism of Famciclovir can be decreased when combined with Fostamatinib.
Baricitinib Baricitinib The metabolism of Baricitinib can be decreased when combined with Famciclovir.
Ivosidenib Ivosidenib The metabolism of Famciclovir can be decreased when combined with Ivosidenib.
Dacomitinib Dacomitinib The metabolism of Dacomitinib can be decreased when combined with Famciclovir.
Duvelisib Duvelisib The metabolism of Duvelisib can be decreased when combined with Famciclovir.
Stiripentol Stiripentol The metabolism of Famciclovir can be decreased when combined with Stiripentol.
Gilteritinib Gilteritinib The metabolism of Gilteritinib can be decreased when combined with Famciclovir.
Paclitaxel (with albumin) Injection Paclitaxel (with albumin) Injection The metabolism of Paclitaxel can be decreased when combined with Famciclovir.
Rifamycin Rifamycin The metabolism of Famciclovir can be increased when combined with Rifamycin.
Prucalopride Prucalopride The metabolism of Prucalopride can be decreased when combined with Famciclovir.
Emapalumab-lzsg Injection Emapalumab-lzsg Injection The metabolism of Famciclovir can be increased when combined with Emapalumab.
Siponimod Siponimod The metabolism of Siponimod can be decreased when combined with Famciclovir.
Erdafitinib Erdafitinib The metabolism of Erdafitinib can be decreased when combined with Famciclovir.
Alpelisib Alpelisib The metabolism of Famciclovir can be decreased when combined with Alpelisib.
Triclabendazole Triclabendazole The metabolism of Famciclovir can be decreased when combined with Triclabendazole.
Entrectinib Entrectinib The metabolism of Entrectinib can be decreased when combined with Famciclovir.
Pexidartinib Pexidartinib The metabolism of Pexidartinib can be decreased when combined with Famciclovir.
Pitolisant Pitolisant The serum concentration of Famciclovir can be decreased when it is combined with Pitolisant.
Lefamulin Lefamulin The metabolism of Lefamulin can be decreased when combined with Famciclovir.
Phenytoin Injection Phenytoin Injection The metabolism of Famciclovir can be increased when combined with Phenytoin.
Fosphenytoin Injection Fosphenytoin Injection The metabolism of Famciclovir can be increased when combined with Fosphenytoin.
Zanubrutinib Zanubrutinib The metabolism of Zanubrutinib can be decreased when combined with Famciclovir.
Tazemetostat Tazemetostat The metabolism of Tazemetostat can be decreased when combined with Famciclovir.
Cenobamate Cenobamate The serum concentration of Famciclovir can be decreased when it is combined with Cenobamate.
Tucatinib Tucatinib The metabolism of Tucatinib can be decreased when combined with Famciclovir.
Octreotide Octreotide The metabolism of Famciclovir can be decreased when combined with Octreotide.
Pralsetinib Pralsetinib The metabolism of Famciclovir can be increased when combined with Pralsetinib.
Satralizumab-mwge Injection Satralizumab-mwge Injection The serum concentration of Famciclovir can be decreased when it is combined with Satralizumab.
Progestin-Only (drospirenone) Oral Contraceptives Progestin-Only (drospirenone) Oral Contraceptives The metabolism of Drospirenone can be decreased when combined with Famciclovir.
Vitamin E (Alpha-Tocopherol) Vitamin E (Alpha-Tocopherol) The metabolism of Famciclovir can be increased when combined with Vitamin E.
Theophylline Theophylline The metabolism of Theophylline can be decreased when combined with Famciclovir.
Phenobarbital Phenobarbital The metabolism of Famciclovir can be increased when combined with Phenobarbital.
Methotrexate Injection Methotrexate Injection The metabolism of Methotrexate can be decreased when combined with Famciclovir.
Primidone Primidone The metabolism of Famciclovir can be increased when combined with Primidone.
Chlorpromazine Chlorpromazine The metabolism of Chlorpromazine can be increased when combined with Famciclovir.
Diazepam Diazepam The metabolism of Famciclovir can be decreased when combined with Diazepam.
Lorazepam Lorazepam The metabolism of Famciclovir can be decreased when combined with Lorazepam.
Bromocriptine Bromocriptine The metabolism of Famciclovir can be decreased when combined with Bromocriptine.
Tranylcypromine Tranylcypromine The metabolism of Famciclovir can be decreased when combined with Tranylcypromine.
Phenelzine Phenelzine The metabolism of Famciclovir can be decreased when combined with Phenelzine.
Tetracycline Tetracycline The metabolism of Famciclovir can be decreased when combined with Tetracycline.
Prochlorperazine Prochlorperazine The metabolism of Prochlorperazine can be decreased when combined with Famciclovir.
Methadone Methadone The metabolism of Famciclovir can be decreased when combined with Methadone.
Oxybutynin Oxybutynin The metabolism of Famciclovir can be decreased when combined with Oxybutynin.
Orphenadrine Orphenadrine The metabolism of Orphenadrine can be decreased when combined with Famciclovir.
Phentermine Phentermine The metabolism of Famciclovir can be decreased when combined with Phentermine.
Hydrocortisone Hydrocortisone The metabolism of Famciclovir can be increased when combined with Hydrocortisone.
Doxorubicin Doxorubicin The metabolism of Famciclovir can be decreased when combined with Doxorubicin.
Carbamazepine Carbamazepine The metabolism of Carbamazepine can be increased when combined with Famciclovir.
Clonidine Clonidine The metabolism of Clonidine can be decreased when combined with Famciclovir.
Hydralazine Hydralazine The metabolism of Famciclovir can be decreased when combined with Hydralazine.
Cimetidine Cimetidine The metabolism of Famciclovir can be decreased when combined with Cimetidine.
Warfarin Warfarin The metabolism of Warfarin can be decreased when combined with Famciclovir.
Loperamide Loperamide The metabolism of Famciclovir can be decreased when combined with Loperamide.
Daunorubicin Daunorubicin The metabolism of Famciclovir can be decreased when combined with Daunorubicin.
Griseofulvin Griseofulvin The metabolism of Famciclovir can be increased when combined with Griseofulvin.
Quinine Quinine The metabolism of Famciclovir can be increased when combined with Quinine.
Calcitriol Calcitriol The metabolism of Famciclovir can be increased when combined with Calcitriol.
Sulfinpyrazone Sulfinpyrazone The metabolism of Famciclovir can be increased when combined with Sulfinpyrazone.
Secobarbital Secobarbital The metabolism of Famciclovir can be increased when combined with Secobarbital.
Desipramine Desipramine The metabolism of Famciclovir can be decreased when combined with Desipramine.
Probenecid Probenecid The metabolism of Famciclovir can be increased when combined with Probenecid.
Quinidine Quinidine The metabolism of Quinidine can be decreased when combined with Famciclovir.
Isoniazid Isoniazid The metabolism of Famciclovir can be decreased when combined with Isoniazid.
Rifampin Rifampin The metabolism of Rifampicin can be increased when combined with Famciclovir.
Valproic Acid Valproic Acid The metabolism of Famciclovir can be decreased when combined with Valproic acid.
Tamoxifen Tamoxifen The metabolism of Famciclovir can be decreased when combined with Tamoxifen.
Methimazole Methimazole The metabolism of Famciclovir can be decreased when combined with Methimazole.
Niacin Niacin The metabolism of Famciclovir can be decreased when combined with Niacin.
Danazol Danazol The metabolism of Famciclovir can be decreased when combined with Danazol.
Nortriptyline Nortriptyline The metabolism of Nortriptyline can be decreased when combined with Famciclovir.
Amphotericin B Injection Amphotericin B Injection The metabolism of Famciclovir can be decreased when combined with Amphotericin B.
Colchicine Colchicine The metabolism of Famciclovir can be increased when combined with Colchicine.
Cephalexin Cephalexin The metabolism of Cephalexin can be decreased when combined with Famciclovir.
Acetazolamide Acetazolamide The metabolism of Famciclovir can be decreased when combined with Acetazolamide.
Bacillus Calmette-Guerin (BCG) Vaccine Bacillus Calmette-Guerin (BCG) Vaccine The therapeutic efficacy of Bacillus calmette-guerin substrain tice live antigen can be decreased when used in combination with Famciclovir.
Ketoconazole Ketoconazole The metabolism of Famciclovir can be decreased when combined with Ketoconazole.
Thiotepa Injection Thiotepa Injection The metabolism of Thiotepa can be decreased when combined with Famciclovir.
Vincristine Injection Vincristine Injection The metabolism of Vincristine can be decreased when combined with Famciclovir.
Vinblastine Vinblastine The metabolism of Famciclovir can be decreased when combined with Vinblastine.
Metoprolol Metoprolol The metabolism of Famciclovir can be decreased when combined with Metoprolol.
Diltiazem Diltiazem The metabolism of Famciclovir can be decreased when combined with Diltiazem.
Nifedipine Nifedipine The metabolism of Famciclovir can be increased when combined with Nifedipine.
Verapamil Verapamil The metabolism of Famciclovir can be decreased when combined with Verapamil.
Etoposide Etoposide The metabolism of Famciclovir can be decreased when combined with Etoposide.
Glyburide Glyburide The metabolism of Glyburide can be decreased when combined with Famciclovir.
Dicloxacillin Dicloxacillin The metabolism of Famciclovir can be increased when combined with Dicloxacillin.
Nafcillin Injection Nafcillin Injection The metabolism of Famciclovir can be increased when combined with Nafcillin.
Pimozide Pimozide The metabolism of Pimozide can be decreased when combined with Famciclovir.
Amiodarone Amiodarone The metabolism of Amiodarone can be decreased when combined with Famciclovir.
Lovastatin Lovastatin The metabolism of Famciclovir can be decreased when combined with Lovastatin.
Ciprofloxacin Ciprofloxacin The metabolism of Famciclovir can be decreased when combined with Ciprofloxacin.
Clozapine Clozapine The metabolism of Famciclovir can be decreased when combined with Clozapine.
Clarithromycin Clarithromycin The metabolism of Famciclovir can be decreased when combined with Clarithromycin.
Felodipine Felodipine The metabolism of Famciclovir can be decreased when combined with Felodipine.
Teniposide Injection Teniposide Injection The metabolism of Famciclovir can be decreased when combined with Teniposide.
Itraconazole Itraconazole The metabolism of Famciclovir can be decreased when combined with Itraconazole.
Rifabutin Rifabutin The metabolism of Famciclovir can be increased when combined with Rifabutin.
Doxazosin Doxazosin The metabolism of Doxazosin can be decreased when combined with Famciclovir.
Isradipine Isradipine The metabolism of Famciclovir can be decreased when combined with Isradipine.
Omeprazole Omeprazole The metabolism of Famciclovir can be increased when combined with Omeprazole.
Cisapride Cisapride The metabolism of Cisapride can be decreased when combined with Famciclovir.
Fluvastatin Fluvastatin The metabolism of Famciclovir can be decreased when combined with Fluvastatin.
Fluvoxamine Fluvoxamine The metabolism of Famciclovir can be decreased when combined with Fluvoxamine.
Nefazodone Nefazodone The metabolism of Famciclovir can be decreased when combined with Nefazodone.
Losartan Losartan The metabolism of Famciclovir can be decreased when combined with Losartan.
Vinorelbine Injection Vinorelbine Injection The metabolism of Vinorelbine can be decreased when combined with Famciclovir.
Lansoprazole Lansoprazole The metabolism of Famciclovir can be increased when combined with Lansoprazole.
Ifosfamide Injection Ifosfamide Injection The metabolism of Famciclovir can be decreased when combined with Ifosfamide.
Nicardipine Nicardipine The metabolism of Famciclovir can be decreased when combined with Nicardipine.
Ticlopidine Ticlopidine The metabolism of Famciclovir can be decreased when combined with Ticlopidine.
Saquinavir Saquinavir The metabolism of Saquinavir can be decreased when combined with Famciclovir.
Ritonavir Ritonavir The serum concentration of Famciclovir can be increased when it is combined with Ritonavir.
Docetaxel Injection Docetaxel Injection The metabolism of Famciclovir can be decreased when combined with Docetaxel.
Clomipramine Clomipramine The metabolism of Clomipramine can be decreased when combined with Famciclovir.
Zafirlukast Zafirlukast The metabolism of Famciclovir can be decreased when combined with Zafirlukast.
Mirtazapine Mirtazapine The metabolism of Famciclovir can be decreased when combined with Mirtazapine.
Topiramate Topiramate The metabolism of Famciclovir can be increased when combined with Topiramate.
Azithromycin Azithromycin The metabolism of Famciclovir can be decreased when combined with Azithromycin.
Bicalutamide Bicalutamide The metabolism of Bicalutamide can be decreased when combined with Famciclovir.
Raloxifene Raloxifene The metabolism of Famciclovir can be decreased when combined with Raloxifene.
Irbesartan Irbesartan The metabolism of Famciclovir can be decreased when combined with Irbesartan.
Paroxetine Paroxetine The metabolism of Famciclovir can be decreased when combined with Paroxetine.
Citalopram Citalopram The metabolism of Famciclovir can be decreased when combined with Citalopram.
Efavirenz Efavirenz The metabolism of Famciclovir can be decreased when combined with Efavirenz.
Rabeprazole Rabeprazole The metabolism of Famciclovir can be decreased when combined with Rabeprazole.
Terbinafine Terbinafine The metabolism of Famciclovir can be increased when combined with Terbinafine.

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