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Niacor Side Effects

Generic Name: niacin

Note: This page contains side effects data for the generic drug niacin. It is possible that some of the dosage forms included below may not apply to the brand name Niacor.

Applies to niacin: oral capsule, oral capsule extended release, oral elixir, oral tablet, oral tablet extended release

As well as its needed effects, niacin (the active ingredient contained in Niacor) may cause unwanted side effects that require medical attention.

Severity: Major

If any of the following side effects occur while taking niacin, check with your doctor immediately:

Less common:
  • Darkening of urine
  • light gray-colored stools
  • loss of appetite
  • severe stomach pain
  • yellow eyes or skin

Severity: Minor

Some niacin side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

Less common:
  • Abdominal or stomach pain
  • cough
  • diarrhea
  • feeling of warmth
  • flushing or redness of the skin, especially on the face and neck
  • headache
  • nausea or vomiting
  • rash or itching
  • runny nose
  • sneezing
  • stuffy nose
Incidence not known:
  • Dizziness or faintness
  • dryness of the skin
  • fever
  • frequent urination
  • joint pain
  • muscle aching or cramping
  • side, lower back, or stomach pain
  • swelling of the feet or lower legs
  • unusual thirst
  • unusual tiredness or weakness
  • unusually fast, slow, or irregular heartbeat

It is possible that some side effects of Niacor may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. Drugs.com does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.

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