Simvastatin/niacin (By mouth)
Niacin (NYE-a-sin), Simvastatin (sim-va-STAT-in)
Lowers high cholesterol and triglyceride levels in your blood. This medicine is a combination of vitamin B3 (niacin) and an HMG-CoA inhibitor (statin).
There may be other brand names for this medicine.
When This Medicine Should Not Be Used
Do not use this medicine if you had an allergic reaction to simvastatin or niacin. Do not use this medicine if you are pregnant or breastfeeding or if you have active liver disease, bleeding problems, or a stomach ulcer. Do not use this medicine if you also use the following medicines: boceprevir (Victrelis®), cyclosporine (Gengraf®, Neoral®, Sandimmune®), danazol (Danocrine®), gemfibrozil (Lopid®), nefazodone (Serzone®), telaprevir (Incivek®), certain antibiotics (such as clarithromycin, erythromycin, itraconazole, ketoconazole, posaconazole, telithromycin, Nizoral®), certain blood pressure medicines (such as diltiazem, verapamil, Calan®, Cardizem®, Verelan®), or certain medicines to treat HIV/AIDS (such as atazanavir, indinavir, nelfinavir, ritonavir, saquinavir, Crixivan®, Kaletra®, Lexiva®, Norvir®, Prezista®, Reyataz®).
How to Use This Medicine
Long Acting Tablet
- Your doctor will tell you how much of this medicine to use and how often. Your dose may need to be changed several times in order to find out what works best for you. Do not use more medicine or use it more often than your doctor tells you to.
- Swallow the extended-release tablet whole. Do not crush, break, or chew it.
- It is best to take this medicine at bedtime, with a low-fat snack.
- Carefully follow your doctor's instructions about diet and exercise. This medicine is part of a complete plan for lowering cholesterol and triglycerides in your blood.
If a dose is missed:
- If you miss a dose or forget to use your medicine, use it as soon as you can. If it is almost time for your next dose, wait until then to use the medicine and skip the missed dose. Do not use extra medicine to make up for a missed dose.
How to Store and Dispose of This Medicine
- Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light.
- Ask your pharmacist, doctor, or health caregiver about the best way to dispose of any outdated medicine or medicine no longer needed.
- Keep all medicine away from children and never share your medicine with anyone.
Drugs and Foods to Avoid
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
- Make sure your doctor knows if you also use amiodarone (Cordarone®), amlodipine (Norvasc®), colchicine (Colcrys®), digoxin (Lanoxin®), ranolazine (Ranexa®), voriconazole (Vfend®), other medicine to lower cholesterol (such as cholestyramine, colestipol, fenofibrate, Colestid®, Questran®, Tricor®), or a blood thinner (such as warfarin, Coumadin®, Jantoven®).
- If you also use cholestyramine (Questran®) or colestipol (Colestid®), take it at least 4 to 6 hours before you take this medicine.
- Tell your doctor if you drink more than 2 glasses of alcohol per day or if you drink grapefruit juice.
- Talk to your doctor if you take vitamins that contain niacin or nicotinamide.
- Do not drink alcohol or hot beverages or eat spicy foods at the same time that you take this medicine. These items together with the medicine may cause you to feel warm or flushed.
Warnings While Using This Medicine
- Using this medicine while you are pregnant can harm your unborn baby. Use an effective form of birth control to keep from getting pregnant. If you think you have become pregnant while using the medicine, tell your doctor right away.
- Make sure your doctor knows if you have kidney disease, diabetes, gout, thyroid problems, or muscle pain or weakness. Tell your doctor if you have a history of liver disease or if you drink alcohol regularly.
- Call your doctor right away if you have unexplained muscle pain, tenderness, or weakness. These may be symptoms of a serious muscle problem called myopathy.
- Call your doctor right away if you have dark-colored urine, fever, muscle cramps or spasms, muscle pain or stiffness, or unusual tiredness or weakness. These could be symptoms of a serious muscle problem called rhabdomyolysis, which can cause kidney problems.
- Talk to your doctor if you are Chinese or have Chinese ancestry and take large amounts of niacin (Niacor®, Niaspan®). Chinese patients who take large amounts of niacin (greater than or equal to 1 gram or 1000 milligrams per day) together with this medicine may have an increased risk for muscle injury.
- Make sure any doctor or dentist who treats you knows that you use this medicine. You may need to stop using this medicine if you have major surgery, a major injury, or you develop other serious health problems.
- Your doctor will need to check your blood at regular visits while you are using this medicine. Be sure to keep all appointments.
Possible Side Effects While Using This Medicine
Call your doctor right away if you notice any of these side effects:
- Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing
- Blistering, peeling, red skin rash
- Dark-colored urine or pale stools, nausea, vomiting, loss of appetite, pain in your upper stomach, yellow skin or eyes
- Muscle pain, tenderness, or weakness
- Unusual tiredness
If you notice these less serious side effects, talk with your doctor:
- Confusion or problems with memory
- Warmth or redness in your face, neck, arms, or upper chest
If you notice other side effects that you think are caused by this medicine, tell your doctor
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088
- Last Reviewed on 06/12/2013
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This page was last updated: June 18, 2013