Does Niacin show up in your system for a employment drug screening

if I took 2 darvocet's, the last one 24hrs ago, will this show up in a drug screen tomorrow at 3pm?

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 need to know...please help if you know how long does vicodin show up on a drug test?

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

I did a large quanity of cocaine on the 4th of August and I had a drug text on the 13th,will it show up in my urine

months. I can eat whatever I want and dont gain weight. I didnt smoke at all before that, had some serious depression and cop...

I have taken 4 darvocet tablets for pain about a week ago how long will it remain in my system. They were taken on 04-10-2008...

if I drink lots of creatine before a medical will it take the drugs out of my system

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...

like how long it can be traced in urine/bloodstream/whatever else? E