Orrrrr you can take 14 roundy's brand 250mg niacin pills and then another 14 the next day both before you goto bed so you sleep through the itching and hotness......the ndrink water when you can to keep it clean...you dont have to drin kwater just make sure you do the 2 day niaci nthing 2 days before ur drug etst and you'll pass my friend...I've been smoking and passing drug tests this way for ages..