tell your doctor and pharmacist what other 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: certain antifungal medications such as fluconazole (Diflucan), itraconazole (Onmel, Sporanox), ketoconazole, posaconazole (Noxafil), or voriconazole (Vfend); calcium channel blockers such as amlodipine (Norvasc), diltiazem (Cardizem, Dilacor XR, Tiazac), felodipine, nicardipine (Cardene), nifedipine (Adalat, Procardia), nisoldipine (Sular), or verapamil (Calan, Verelan, others); certain medications for high cholesterol such as atorvastatin (Lipitor, in Caduet), lovastatin (Altoprev), pitavastatin (Livalo), pravastatin (Pravachol), rosuvastatin (Crestor), or simvastatin (Flolipid, Zocor, in Vytorin); cisapride (Propulsid) (not available in the U.S.); clarithromycin (Biaxin, in Prevpac); medications containing cobicistat (Stribild); erythromycin (E.E.S., Eryc, Ery-tab, others), certain medications for HIV such as atazanavir (Reyataz), darunavir (Prezista), delavirdine (Rescriptor), efavirenz (Sustiva), etravirine (Intelence), fosamprenavir (Lexiva), indinavir (Crixivan), lopinavir (Kaletra), nelfinavir (Viracept), nevirapine (Viramune), ritonavir (Norvir), saquinavir (Invirase), or tipranavir (Aptivus); certain medications for irregular heartbeat such as amiodarone (Nexterone, Pacerone), disopyramide (Norpace), flecainide (Tambocor), mexiletine , propafenone (Rythmol SR), or quinidine (in Nuedexta); cyclosporine (Gengraf, Neoral, Sandimmune); dexamethasone; digoxin (Lanoxin); ledipasvir (Harvoni); midazolam taken by mouth; rifabutin (Mycobutin); rifampin (Rifadin, Rimactane, in Rifamate, in Rifater); rifapentine (Priftin); certain medications for seizures such as carbamazepine (Epitol, Equetro, Tegretol), oxcarbazepine (Trileptal), phenobarbital, or phenytoin (Dilantin, Phenytek); sildenafil (only Revatio brand used for lung disease); sirolimus (Rapamune); tacrolimus (Prograf); tadalafil (only Adcirca brand used for lung disease); telithromycin (Ketek); triazolam (Halcion) taken by mouth; vardenafil (Levitra, Staxyn), or warfarin (Coumadin, Jantoven). Your doctor may need to change the doses of your medications or monitor you carefully for side effects. Many other medications may also interact with simeprevir, so be sure to tell your doctor about all the medications you are taking, even those that do not appear on this list.
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. Simeprevir 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 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 prior to treatment, 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.