A 40-year-old member asked:
how long can weed stay in your system if you only smoked once?
1 doctor answer
Dr. Heidi Fowler answered
24 years experience Psychiatry
Detection: Single use of marijuana should be out of your urine in 1 to 7 days. Single use marijuana can be detected 12 to 24 hours in blood. Single use might not be picked up in hair.
Answered on Feb 11, 2019
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