When is it a good time to take niacin before a urine test?

I took a drug test today and I quit smoking 3 days bef0re ,I weigh 180 6'0ft tall,when I smoked I only smoked bout 1 time a d...

I have three hours to pass a urine drug test and no money. Its for meth. and I don't know anyone who will share they're pee. ...

Im pregnant an I hurd myself an my baby will be drug tested after I give birth an I smoke three days ago for the first time i...

If I smoke weed/dro today will the drugs be out of my system in two days? How many niacin should I take if so?

I have a dug test in less than 2 weeks in im taking sundown naturals niacin 500mgs is this the right kind ?

I have to take a urinary drug test for a job on monday, and I did smoke a lot of pot the weekend before for the holidays, but...

If I start niacin and take 500mg 3 times a day for 7 days, If I have a drug test in a month (and don't smoke) will my test st...

I have a urine drug test to take in 1 day, and I smoke marjuania! What can I take to clean my system and not cost so much mon...

I need to pass a drug test for propation I just quit which only leaves me with 9 days to clean my system out. Will niacin and...

I just wanted to know if niacin will help me to pass a urinary drug test?