side effect slo niacin
The most common side effects of niacin are: stomach upset, flushing, headache, reduced blood pressure upon standing (orthostatic hypotension), vomiting, diarrhea, itching and ; tingling sensations of the extremities. Flushing may be reduced by taking 325 mg of aspirin 30 minutes before the niacin and by increasing the dose of niacin slowly.