Marijuana can be detected in a urine test for 3 days after use for a non-user. If you're a frequent smoker, it can last be detected over a month after your las

Marijuana can be detected in a urine test for 3 days after use for a non-user. If you're a frequent smoker, it can last be detected over a month after your last use. Even longer in hair tests. Obviously being high at work isn't a good thing, but neither is being drunk at work. But you don't get fired for having a few beers on the weekend.