How long does marijuana stay in the bloodstream?

Depends: The drug will attach to fat cells in your system and gradually release/disappear over time. Infrequent or brief exposure will usually clear within a week.A chronic user may see a positive test for a month or more after stopping.

Thc in bloodstream: Hunault et al 2000 calculated that high dose (23 %) marihuana can stay in your blood stream up to 8 hours. However cannabis users can have products of metabolism circulating and excreted for prolonged periods of time. Cannabis users are usually identified through detection of 11-nor-9-corboxy-delta9-tetrahydrocannabinol (thccooh) in urine. Thccooh may be detectable up to 3 months.