As a person who suffers from POIS, I have taken Niacin shortly after ejaculation and have found it to be extremely helpful in alleviating the physical and cognitive dysfunction. The first time I took it, I flushed really hard for almost an hour and couldn't sleep. I still try to avoid ejaculating as much as I can, because I don't care for the side effects of Niacin. For instance, the third time I tried it, I waited almost two hours for the flush and when it occurred it hit hard, right in the middle of my lecture class, I was extremely embarrassed and tried to hide my face with my arms, it got worse as I started to tingle all over and my body was engulfed in heat. I left the class and went for a walk and drank tons of water, after an hour the flush subsided and POIS symptoms were non existent. However my skin felt and smelled of some trace element and I felt different for the whole day. I don't know what is worse the POIS or its overly effective treatment? I have heard that Niacin can alter ones mood, blood pressure, and even put enormous stress on the heart,. I feel that this my case. Are there other alternative s?