A male asked:
Disclaimer

started taking slo niacin today and had a flush about 4 hours after taking. how long will it last and can it be prevented. it is uncomfortable so i m?

1 doctor answer
Dr. Corey Clay
9 years experience Allergy and Immunology
Hours: flush due to extended release niacin generally lasts for hours. some physicians recommend aspirin or another nsaid (if you tolerate them) 30 minutes prior to taking fast-acting niacin. In this case, taking them a few hours after the extended release niacin may work better. Would also suggest taking with food and avoiding other triggers like alcohol or hot liquids.
Answered on Aug 19, 2017
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