Niacin

[killerweed420]

An interesting read for those dumb enough to believe niacin works
Morons Overdose on Niacin While Trying to Beat a Drug Test | Wired Science from Wired.com (http://blog.wired.com/wiredscience/2007/10/morons-overdose.html)

[jeffman]

It's amazing that someone will come along soon and praise it again instead of reading this.

[Madlib]

haha my friend used niacin before drug tests and he would get all red and itchy. but it worked for him, must have been all the cranberry juice he would drink along with the niacin that really worked.

[S.R.H.~BUDSMOKER~S.G]

ive had freinds that take 15 to 20 just a couple days before drug tests and there good no overdosing and yes they are the ``flush``