Niacin 500 is an over-the-counter dietary supplement that contains 500 mg of niacin, which is also called vitamin B-3. Treatment with this supplement may help reduce high cholesterol levels and support your body's ability to produce energy. Consult a medical professional if you have questions or concerns regarding Niacin 500 side effects.
Niacin Flush
"Niacin flush" is the most common side effect associated with niacin supplements, according to the University of Maryland Medical Center. While receiving treatment with Niacin 500, you may notice that your facial skin appears unusually red or flushed. You may also develop sensations of warmth, tingling or itching across your body due to niacin flush. These side effects are temporary and progressively subside shortly after you take a dose of Niacin 500. Your doctor may recommend that you take an aspirin approximately 30 minutes before taking niacin to reduce or prevent niacin flush side effects.
Stomach Discomfort
Niacin may irritate your digestive tract or stomach and may cause heartburn, nausea or vomiting, Drugs.com warns. You may also develop bowel movement changes such as diarrhea, which may lead to abdominal cramping, bloating or discomfort. Additionally, persistent stomach discomfort may contribute to a decrease in your usual appetite. If you develop severe stomach pain or stomach-related side effects while taking Niacin 500, seek prompt care from your physician.
Headache or Dizziness
Treatment with this vitamin B-3 supplement may cause headache pain or dizziness. Headache discomfort may affect your ability to concentrate or remain attentive while at home, work or school. Sensations of dizziness may cause you to feel unstable while standing or walking and may exacerbate headache pain. Consult a doctor if you experience recurrent or severe episodes of dizziness.
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