what drugs allow you to pass a urine test the fastest?

Blow

Adderall is out of your system quickly

LINK

Benzo half life is pretty short iirc

Take all of them. When your results come back positive for 13 different things, there must be some mistake.

Water?

Any type of amphetamine (mdma, meth, aderrall) are gone within a few days.

Coke too I believe

Pretty much anything except weed, as it stores in fat cells.

Also, heroin stays a few days longer than coke. Not by much though.

If you sweat a lot and drink a bunch of water, you should be good.

It should be noted that it really depends on what is being used to test. The instant cheap tests that are commonly used aren't near as accurate as some testing machines. I work in the criminal system, and the drug court machines they have are unbelievable at what they can detect and how far out they can. They can quantify how much is in your system to see how much you've used, how long it's been, and they also test for how much water is in your system to ensure you aren't diluting your sample.

That said, cocaine and amphetamines as some have noted are quicker to leave your system than weed.