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Note: This document contains side effect information about niacin. Some of the dosage forms listed on this page may not apply to the brand name Niacor.
Common side effects of Niacor include: pruritus, nausea, and flushing. See below for a comprehensive list of adverse effects.
Applies to niacin: oral capsule, oral capsule extended release, oral tablet, oral tablet extended release
Along with its needed effects, niacin (the active ingredient contained in Niacor) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur while taking niacin:
Some side effects of niacin may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Incidence not known
Applies to niacin: compounding powder, oral capsule, oral capsule extended release, oral liquid, oral tablet, oral tablet extended release
Very common (10% or more): Flushing (i.e., warmth, redness, itching, and/or tingling) (up to 88%)
Frequency not reported: Tachycardia, palpitations, atrial fibrillation, other cardiac arrhythmias, syncope, hypotension, postural hypotension
Common (1% to 10%): Rash, pruritus
Frequency not reported: Sweating, skin burning sensation, maculopapular rash, dry skin
Postmarketing reports: Skin discoloration
Very common (10% or more): Diarrhea (up to 14%), nausea (up to 11%)
Common (1% to 10%): Vomiting
Frequency not reported: Peptic ulcers, eructation, flatulence
Postmarketing reports: Slight reductions in platelet counts, prothrombin time prolonged
Postmarketing reports: Hypersensitivity reactions (e.g., anaphylaxis, angioedema, urticaria, flushing, dyspnea, tongue edema, larynx edema, face edema, peripheral edema, laryngismus, vesiculobullous rash)
Postmarketing reports: Hepatitis, jaundice
Frequency not reported: Decreased glucose tolerance, gout
Frequency not reported: Myalgia, myopathy
Frequency not reported: Dizziness, syncope
Postmarketing reports: Migraine, asthenia, paresthesia
Postmarketing reports: Blurred vision, macular edema
Postmarketing reports: Insomnia, nervousness
Frequency not reported: Chills, edema
Common (1% to 10%): Cough increased
Frequency not reported: Dyspnea