How do you counteract an allergic reaction to niacin?
Niacin does have occasional side effects, but allergic reactions are unlikely because it is an essential B vitamin everyone needs, states WebMD. Typical side effects of niacin include abdominal pain, headache, stuffy or runny nose, and flushing of the skin, reports Drugs.com. These symptoms do not normally require medical attention, but an individual should consult a health care professional if symptoms persist or cause concern.
Sources: webmd.com, drugs.com, answers.sea1.webmd.com