Niacinamide Side Effects by Likelihood and Severity

COMMON side effects


If experienced, these tend to have a Less Severe expression

  • Gas
  • Heartburn
  • Stinging Of Skin
  • Temporary Redness Of Face And Neck

INFREQUENT side effects


If experienced, these tend to have a Less Severe expression

  • Abnormally Low Blood Pressure
  • Diarrhea
  • Dizzy
  • Dry Skin
  • Fast Heartbeat
  • Feel Like Throwing Up
  • High Amount Of Uric Acid In The Blood
  • High Blood Sugar
  • Itching
  • Rash
  • Throwing Up
  • Worsening Of Peptic Ulcer

RARE side effects


If experienced, these tend to have a Severe expression

  • Abnormal Liver Function Tests

If experienced, these tend to have a Less Severe expression

  • Abnormal Heart Rhythm
  • Blurred Vision
  • Feeling Faint
  • Head Pain
  • Skin Darkening
  • Swelling Of The Abdomen

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CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.