A 34-year-old member asked:
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how much time does weed stay in your system?

1 doctor answer
Dr. Heidi Fowler
24 years experience Psychiatry
That depends.: Single use marijuana may be found in blood for 12 to 24 hours. Regular use marijuana may be found in blood for 2 to 7 days. 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). It can remain in hair follicles for months.
Answered on May 5, 2014

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