Will nicacin and morphine counter react and show up in a urine test?

Question

I have to do a drug test in the morning and I used cocaine and morphine. I am concerned that if I use nicacin to clean my system it will react with the morphine and show up as a positve test.

Answer 1

Niacin causes a flush: i.e., you'll flush and turn red. Extending that to "flushing the system" is quackery: it just doesn't do it. Save yourself the bother.