A member asked:

I took 4 hits of marijuana yesterday evening. i have to take a urine test today. what are my odds of passing? my system was clean before.

6 doctors weighed in across 3 answers
Dr. Heidi Fowler answered

Specializes in Psychiatry

Poor odds.: Single use marijuana might be detected in urine for 1 to 7 days (or more) and regular marijuana use can be detected in urine for 7 to 100 days (longer periods have been reported though).

Answered 11/28/2017

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Dr. Jerry Fioramonti answered

Specializes in Family Medicine

Almost zero: The urine screen for marijuana is sensitive and you will likely fail your screen.

Answered 4/24/2014

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Dr. Andrew Ho answered

Specializes in Psychiatry

Very low: I have heard patients tell me they had positive urine test but did not smoke, merely exposed to smoke from friends in the same room. If they were telling me the truth, then you definitely will test positive after 4 hits.

Answered 6/9/2018

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