B3-500-Gr Side Effects

Generic name: niacin

Medically reviewed by Drugs.com. Last updated on Jul 26, 2021.

Note: This document contains side effect information about niacin. Some dosage forms listed on this page may not apply to the brand name B3-500-Gr.

Applies to niacin: oral tablets.

Side effects include:

Flushing (e.g., warmth, redness, itching and/or tingling), headache, pain, abdominal pain, diarrhea, dyspepsia, nausea, vomiting, rhinitis, pruritus, rash.

For Healthcare Professionals

Applies to niacin: compounding powder, oral capsule, oral capsule extended release, oral liquid, oral tablet, oral tablet extended release.

Cardiovascular

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^[Ref]

Dermatologic

Common (1% to 10%): Rash, pruritus

Frequency not reported: Sweating, skin burning sensation, maculopapular rash, dry skin

Postmarketing reports: Skin discoloration^[Ref]

Gastrointestinal

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^[Ref]

Hematologic

Postmarketing reports: Slight reductions in platelet counts, prothrombin time prolonged^[Ref]

Hypersensitivity

Postmarketing reports: Hypersensitivity reactions (e.g., anaphylaxis, angioedema, urticaria, flushing, dyspnea, tongue edema, larynx edema, face edema, peripheral edema, laryngismus, vesiculobullous rash)^[Ref]

Hepatic

Postmarketing reports: Hepatitis, jaundice^[Ref]

Metabolic

Frequency not reported: Decreased glucose tolerance, gout^[Ref]

Musculoskeletal

Frequency not reported: Myalgia, myopathy^[Ref]

Nervous system

Frequency not reported: Dizziness, syncope

Postmarketing reports: Migraine, asthenia, paresthesia^[Ref]

Ocular

Postmarketing reports: Blurred vision, macular edema^[Ref]

Psychiatric

Postmarketing reports: Insomnia, nervousness^[Ref]

Other

Frequency not reported: Chills, edema^[Ref]

Respiratory

Common (1% to 10%): Cough increased

Frequency not reported: Dyspnea^[Ref]

Frequently asked questions

• How long does niacin stay in the human system?

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.

Medical Disclaimer