Niacin is an over-the-counter supplement also known as the water-soluble vitamin B-3. Treatment with this supplement may help lower cholesterol levels in people with hypercholesterolemia and help restore blood levels of niacin in people with pellagra, a condition characterized by niacin deficiency, the University of Maryland Medical Center reports. Niacin may cause temporary side effects, which you should discuss with your doctor prior to use.
Flushing
One of the most common side effects that occur during treatment with niacin is flushing. The skin across your chest, face or body may appear unusually red and may be hot to the touch. You may also develop sensations of tingling or itching across the affected body region, Drugs.com reports. Flushing is temporary and typically subsides within a few hours of taking niacin.
Nausea or Vomiting
You may feel nauseated or begin vomiting after taking a dose of niacin, the Linus Pauling Institute at Oregon State University reports. Stomach irritation may also cause a temporary decrease in your normal appetite. If these side effects persist or increase in severity, seek care from a medical professional.
Headache or Dizziness
While receiving treatment with this vitamin B-3 supplement, you may experience episodes of dizziness or headache pain, Drugs.com warns. Headache discomfort may interfere with your ability to concentrate during your daily activities. If sensations of dizziness arise, remain seated until the episode passes to avoid injury from tripping or falling down.
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