alright im not sure if i am just sensitive to this but i started taking niacin from NOW its 500mg pills "sustained release" it doesnt say flush free but i figured that it was similar to that, however this morning i took one pill and 15 minutes later it looked like i was sun burnt really bad and i felt really warm and itchy for like at least an hour, my question is will these sides be less harsh the more i take it or is my body just going to react like that every time, i had to skip one of my classes because i looked like an a*shole. thanks for the help