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Drug Information For:


Ingredient Name:

NIACIN (NYE-a-sin)

Drug Manufacturer:


Common Uses:

This medicine is a vitamin used to treat or prevent low levels of niacin. It may also be used to treat other conditions as determined by your doctor.

Before Using This Medicine:

INFORM YOUR DOCTOR OR PHARMACIST of all prescription and over-the-counter medicine that you are taking. ADDITIONAL MONITORING OF YOUR DOSE OR CONDITION may be needed if you are also taking fibrates (e.g., gemfibrozil, fenofibrate), or "statins" (e.g., lovastatin, atorvastatin). Inform your doctor of any other medical conditions, allergies, pregnancy, or breast-feeding.

How to Use This Medicine:

Follow the directions for using this medicine provided by your doctor or on the package. SWALLOW WHOLE. Do not break, crush, or chew before swallowing. THIS MEDICINE MAY BE TAKEN WITH FOOD if it upsets your stomach. STORE THIS MEDICINE at room temperature, away from heat and light. IF YOU MISS A DOSE OF THIS MEDICINE, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.


DO NOT TAKE large doses of vitamins (megadoses or megavitamin therapy) while taking this medicine unless directed to by your doctor. THIS MEDICINE MAY CAUSE DIZZINESS. If dizziness occurs, sit up or stand up slowly. BEFORE YOU BEGIN TAKING ANY NEW MEDICINE, either prescription or over-the-counter, check with your doctor or pharmacist. IT IS IMPORTANT that you keep all doctor and laboratory appointments while you are taking this medicine. THIS MEDICINE MAY CAUSE warmth or flushing. Check with your doctor for ways to lessen these effects. IF YOU HAVE DIABETES AND USE INSULIN, this medicine may affect your blood sugar and insulin requirements. Check blood glucose levels closely and ask your doctor before adjusting the dose of your insulin.

Possible Side Effects:

SIDE EFFECTS, that may go away during treatment, include a temporary feeling of warmth or flushing of the skin, itching, headache, dizziness, nausea, bloating, gas, or heartburn. If they continue or are bothersome, check with your doctor. CHECK WITH YOUR DOCTOR AS SOON AS POSSIBLE if you experience continued flushing of the skin, vomiting, diarrhea, changes in vision, fast or irregular heartbeat, or yellowing of the skin or eyes. If you notice other effects not listed above, contact your doctor, nurse, or pharmacist. This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your healthcare provider. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.


If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms may include flushing.

Additional Information:

DO NOT SHARE THIS MEDICINE with others for whom it was not prescribed. DO NOT USE THIS MEDICINE for other health conditions. KEEP THIS MEDICINE out of the reach of children. IF USING THIS MEDICINE FOR AN EXTENDED PERIOD OF TIME, obtain refills before your supply runs out.

Copyright 2015 Wolters Kluwer Health, Inc.


- This information is not intended to substitute for professional medical advice. Be sure to contact your physician, pharmacist or other health care provider for more information about this medication. By searching these web site pages, you agree to our terms and conditions of use.