A member asked:

Last time i smoked weed was november 23..i have a hair drug test march 19..will i pass?

A doctor has provided 1 answer
Dr. Heidi Fowler answered

Specializes in Psychiatry

Cannabis: is usually out of the system for hair follicle testing within 3 mo. But if use was really heavy & long-term there have been cases where metabolites were picked up > 100 days after last use. Single use Marijuana might be detected in urine for 1 to 7 days (or more) &regular marijuana use can be detected in urine for 7 to 100 days .Single use THC may be found in blood for 12 to 24 hrs.

Answered 4/8/2016

3.1k views

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