Can I use a child's pee to pass a drug test? Yes, it can be done. An exception to drug-free urine is a donor who used marijuana because it stores in the fat cells and other organs in the body and can be detected by the most basic urine drug test for months afterward.
Storing it incorrectly could cause it to go bad way before its actual listed expiration date. No matter what, you should never use expired pee for a drug test! Using expired piss will compromise your test results, raise suspicion, and put you at risk.