You're not meant to test them all yourself.

I once took a drug test for a federal job and it came back positive for heroin, cocaine, and meth. Turns out the test itself was faulty.

Well you're missing a range of drugs for starters. There's ones like abilify and zyvox you aren't even studying!

Find out how the test is graded. If it was graded on a curve, an overachiever may have stretched the curve and you’d have to pump up your rookie numbers to get a pass.

Youre supposed to do all the drugs before you take the test that way you can answer about what they feel like

Hold up, you're studying drugs or you are getting tested for drugs in your system?