Up to a week but...: This depends on how much and how often you smoked marijuana. In regular users the psychoactive form of THC stays in your body up to a week, though very little will remain after 2-3 days. However, a non-psychoactive metabolite, THC-COOH can stay in your body for months and be detected in urine tests for up to 100 days. See http://tinyurl.com/oav3724 for details.
Answered 6/16/2017
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