Before taking simvastatin,
tell your doctor and pharmacist if you are allergic to simvastatin, any other medications, or any of the ingredients in simvastatin tablets. Ask your doctor or pharmacist for a list of the ingredients.
tell your doctor if you are taking antifungal medications such as itraconazole (Sporanox), ketoconazole (Nizoral), posaconazole (Noxafil) and voriconazole (Vfend); boceprevir (Victrelis); clarithromycin (Biaxin, in Prevpac); cobicistat-containing medications (Stribild); cyclosporine (Gengraf, Neoral, Sandimmune); danazol; erythromycin (E.E.S., E-Mycin, Erythrocin); gemfibrozil (Lopid); HIV protease inhibitors such as atazanavir (Reyataz), darunavir (Prezista), fosamprenavir (Lexiva), indinavir (Crixivan), lopinavir (in Kaletra), nelfinavir (Viracept), ritonavir (Norvir, in Kaletra), saquinavir (Invirase), and tipranavir (Aptivus); nefazodone; telaprevir (Incivek); and telithromycin (Ketek). Your doctor will probably tell you not to take simvastatin if you are taking these 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: amiodarone (Cordarone, Pacerone); amlodipine (Norvasc, in Caduet, in Lotrel); anticoagulants ('blood thinners') such as warfarin (Coumadin, Jantoven); colchicine (Colcrys); digoxin (Digitek, Lanoxicaps, Lanoxin); diltiazem (Cardizem, Dilacor, Tiazac); dronedarone (Multaq); other cholesterol-lowering medications such as fenofibrate (Tricor), lomitapide (Juxtapid), and niacin (nicotinic acid, Niacor, Niaspan); ranolazine (Ranexa); and verapamil (Calan, Covera, Isoptin, Verelan). . Your doctor may need to change the doses of your medications or monitor you carefully for side effects. Other medications may also interact with simvastatin, 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 have liver disease. Your doctor will order blood tests to see how well your liver is working even if you do not think you have liver disease. Your doctor will probably tell you not to take simvastatin if you have liver disease or if the tests show that you may be developing liver disease.
tell your doctor if you drink more than two alcoholic beverages per day, if you are 65 years of age or older, or if you are Asian, especially if you are Chinese. Also tell your doctor if you have or have ever had an underactive thyroid gland, diabetes, seizures, muscle aches or weakness, low blood pressure, or kidney disease.
tell your doctor if you are pregnant or plan to become pregnant. You should not become pregnant during your treatment with simvastatin. Talk to your doctor about birth control methods that will work for you. If you become pregnant while taking simvastatin, stop taking simvastatin and call your doctor immediately. Simvastatin can harm the fetus.
tell your doctor if you are breastfeeding. You should not breastfeed while you are taking simvastatin.
if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking simvastatin. If you are hospitalized due to serious injury or infection, tell the doctor who treats you that you are taking simvastatin.
ask your doctor about the safe use of alcoholic beverages while you are taking simvastatin. Alcohol can increase the risk of serious side effects.