I take niacin to treat my cholesterol. Should I be concerned about a potential niacin overdose?

Answer From Katherine Zeratsky, R.D., L.D.

Niacin overdose is unlikely if you take niacin only in the amount prescribed by your doctor. While it's not possible to overdose on niacin simply by eating too many niacin-rich foods, taking too much over-the-counter or prescription niacin can be dangerous.

Niacin overdose signs and symptoms include:

  • Severe skin flushing combined with dizziness
  • Rapid heartbeat
  • Itching
  • Nausea and vomiting
  • Abdominal pain
  • Diarrhea
  • Gout

If you think you may have overdosed, seek medical attention immediately.

Because niacin has also been linked to liver damage and strokes, most doctors now recommend it only for people who can't take statins to treat high triglyceride levels. If you're concerned about taking niacin, talk to your doctor.

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May 05, 2022 See more Expert Answers

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  25. Hypothyroidism: Can calcium supplements interfere with treatment?
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  29. Hypothyroidism symptoms: Can hypothyroidism cause eye problems?
  30. Hypothyroidism (underactive thyroid)
  31. Is your diet hurting your heart?
  32. Lowering Triglycerides
  33. Menus for heart-healthy eating
  34. Metabolic syndrome
  35. Niacin to improve cholesterol numbers
  36. Nuts and your heart: Eating nuts for heart health
  37. Is there a risk of rhabdomyolysis from statins?
  38. Soy: Does it reduce cholesterol?
  39. Soy: Does it worsen hypothyroidism?
  40. Statin side effects
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  43. Statins: Should you be on one?
  44. Lifestyle changes to improve cholesterol
  45. Trans fat: A double whammy
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  48. Triglycerides: Why do they matter?
  49. VLDL cholesterol: Is it harmful?