So I just found out today that I need to take a drug test on Monday.... I've been smoking for about three years now with only a few breaks in between, and smoked once yesterday. I'm planning on taking 1000-2000mg of niacin 3-5 times a day for the next three days up until my drug test, and accompanying that with copious amounts of water/cranberry juice. I'm going to be running, jumping rope, and sitting in the sauna everyday. I've had a party weekend planned for a while now, except I won't be smoking - only drinking liquor which will *hopefully* help drain my system out.
I'm male, about 5'7" and weight about 200lbs, most of which is muscle.

My last resort is to crotch a container with my buddy's clean piss, but for obvious discomfort reasons I'd rather clean my system out, do you guys think this is plausible?