Hello. Well I added niacin to my vitamin intake and the first day went off without a hitch. However, the second day I had a reaction that Im not sure is related to the niacin. A few hours after taking it, my neck started to burn then my whole body got red, hot, and splotchy. Has anyone had this happen hours after taking niacin? I took as directed and the reaction lasted about half an hour. Just curious if anyone has had an experience like this before. Thanks.