A member asked:

I went to a friends garage party 4 days ago, people were smoking i was walking in and out of the garage. can i fail a drug test? if i didn't smoke?

A doctor has provided 1 answer

Marijuana?: It is unlikely that a urine drug test will be positive (or stay positive long) based only on this small second-hand exposure, however, depending on weight and how often you have smoked marijuana in the past, it may still be positive from prior use. If you are obese and/or a chronic, heavy user, a drug test will stay positive for several weeks-months.

Answered 12/9/2013

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