How To Pass A Drug Test: Mask THC
A couple of interesting studies show that you might be able to mask THC in a urine test. A 1994 study found that aspirin can interfere with urine test analyses.
Take 4-6 aspirins a few hours before your test, and it could improve your chances of testing negative. Similarly, a 2011 study discovered that zinc could make it harder to detect THC in particular types of urine tests.
Zinc is also hard to detect in urine samples, which makes it an even better masking agent. Try popping a handful of zinc supplements in the days leading up to your test.