how do i pass a drug test in 2 weeks? Niacin and water?? I am 5 4 , weigh 110 lbs, and hate exercise. On 9-25 i quit. I have a drug test on 10-15. On 9-24 i smoked 2 blunts of regular marijuana. Before that- i only smoked two or three times a week. My mom bought me 500mg Niacin, which i haven t started taking because i don t want to take it if it won t help (bc it hurts and makes me extremely hot, itchy, and a little sick for 1 1/2 hours). Do i need to take this Niacin? Will drinking lots of water not help, since THC is stored in my fat cells and not my urinary tract? HELP ME! HOW DO I PASS THIS DRUG TEST ON 10-15??