Boceprevir is used along with two other medications (ribavirin [Copegus, Rebetol] and peginterferon alfa [Pegasys]) to treat chronic hepatitis C (an ongoing viral infection that damages the liver) in people who have not yet been treated for this condition or whose condition did not improve when they were treated with ribavirin and peginterferon alfa alone. Boceprevir is in a class of medications called protease inhibitors. It works by decreasing the amount of hepatitis C virus (HCV) in the body. Boceprevir may not prevent the spread of hepatitis C to other people.

Side Effects Of Boceprevir

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

  • nausea
  • vomiting
  • diarrhea
  • change in the ability to taste
  • loss of appetite
  • excessive tiredness
  • difficulty falling asleep or staying asleep
  • irritability
  • hair loss
  • dry skin
  • rash

Some side effects can be serious. If you experience any of these symptoms or those listed in the IMPORTANT WARNING section, call your doctor immediately or get emergency medical treatment:

  • shortness of breath
  • dizziness
  • fainting
  • weakness
  • sore throat, fever, chills, and other signs of infection

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

Warnings & Precautions

Before taking boceprevir:

  • tell your doctor and pharmacist if you are allergic to boceprevir, any other medications, or any of the ingredients in boceprevir capsules. Ask your pharmacist or check the Medication Guide for a list of the ingredients.
  • tell your doctor if you are taking any of the following medications or herbal products: alfuzosin (Uroxatral); ergot medications such as dihydroergotamine (D.H.E. 45, Migranal), ergonovine, ergotamine (Ergomar, in Cafergot, in Migergot) or methylergonovine; cisapride (Propulsid) (not available in the U.S.); drospirenone (in some oral contraceptives such as Beyaz, Gianvi, Ocella, Safyral, Yasmin, Yaz, and Zarah); lovastatin (Altoprev, Mevacor); certain medications for seizures such as carbamazepine (Carbatrol, Equetro, Tegretol), phenobarbital, or phenytoin (Dilantin); midazolam taken by mouth; pimozide (Orap); rifampin (Rifadin, Rimactane, in IsonaRif, in Rifamate, in Rifater); sildenafil (only Revatio brand used for lung disease); simvastatin (Simcor, in Vytorin); tadalafil (only Adcirca brand used for lung disease); St. John’s wort; or triazolam (Halcion). Your doctor will probably tell you not to take boceprevir if you are taking one or more of these medications.
  • tell your doctor and pharmacist what other prescription and nonprescription medications, vitamins, and nutritional supplements you are taking or plan to take. Be sure to mention any of the following: alprazolam (Niravam, Xanax); anticoagulants (‘blood thinners’) such as warfarin (Coumadin); antifungal medications such as itraconazole (Sporanox), ketoconazole (Nizoral), posaconazole (Noxafil), and voriconazole (Vfend); atorvastatin (Lipitor, in Caduet); bosentan (Tracleer); budesonide (Pulmicort, Rhinocort, Symbicort); buprenorphine (Buprenex, Butrans, Subutex, Suboxone); calcium channel blockers such as felodipine (Plendil), nicardipine (Cardene), and nifedipine (Adalat, Afeditab, Procardia); clarithromycin (Biaxin); colchicine (Colcrys, in Col-Probenecid); cyclosporine (Gengraf, Neoral, Sandimmune); desipramine (Norpramin); dexamethasone; certain medications for erectile dysfunction such as sildenafil (Viagra), tadalafil (Cialis), and vardenafil (Levitra, Staxyn); certain medications for HIV such as atazanavir taken with ritonavir, darunavir taken with ritonavir, efavirenz (Sustiva, in Atripla), lopinavir taken with ritonavir, and ritonavir (Norvir, in Kaletra); certain medications for irregular heartbeat such as amiodarone (Cordarone, Pacerone), digoxin (Lanoxin), flecainide (Tambocor), propafenone (Rythmol), and quinidine; methadone (Dolophine, Methadose); midazolam given intravenously (into a vein); rifabutin (Mycobutin); salmeterol (Serevent, in Advair); sirolimus (Rapamune); tacrolimus (Prograf); and trazodone. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
  • tell your doctor if you have ever had an organ transplant, and if you have or have ever had anemia (not enough red blood cells in the blood to carry oxygen to the rest of the body), human immunodeficiency virus (HIV), acquired immunodeficiency syndrome (AIDS), any other condition that affects your immune system, or hepatitis B (a viral infection that damages the liver) or any type of liver disease other than hepatitis C.
  • if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking boceprevir.
  • tell your doctor if you are pregnant, plan to become pregnant, or can possibly become pregnant. If you are male, tell your doctor if your partner is pregnant, plans to become pregnant, or can possibly become pregnant. Boceprevir must be taken with ribavirin which can seriously harm the fetus. You must use two methods of birth control to prevent pregnancy in you or your partner during your treatment with these medications and for 6 months after your treatment. Talk to your doctor about which methods you should use; hormonal contraceptives (birth control pills, patches, implants, rings, or injections) may not work well in women who are taking these medications. You or your partner must be tested for pregnancy every month during your treatment and for 6 months after your treatment. If you or your partner becomes pregnant while taking these medications, call your doctor immediately.
  • tell your doctor if you are breast-feeding.

Dosage Of Boceprevir

Boceprevir comes as a capsule to take by mouth. It is usually taken with a meal or light snack three times a day (every 7 to 9 hours). Take boceprevir at around the same times every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take boceprevir exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

You will take peginterferon alfa and ribavirin for 4 weeks before you begin treatment with boceprevir. Then you will take all three medications for 12 to 44 weeks. After this time, you will stop taking boceprevir, but you may continue to take peginterferon alfa and ribavirin for an additional number of weeks. The length of your treatment depends on your condition, how well you respond to the medication, and whether you experience severe side effects. Continue to take boceprevir, peginterferon alfa, and ribavirin as long as they are prescribed by your doctor. Do not stop taking any of these medications without talking to your doctor even if you are feeling well.

Your doctor or pharmacist will give you the manufacturer’s patient information sheet (Medication Guide) when you begin treatment with boceprevir and each time you refill your prescription. Read the information carefully and ask your doctor or pharmacist if you have any questions


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

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

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


All information has been provided courtesy of MedLinePlus from the National Library of Medicine and from the FDA.