As a rough guide: if you smoke the occasional joint, weed will stay in your system for up to 10 days. If you smoke regularly, up to 45 days and if you smoke constantly, 90 days. As for being detectable in a drug test, well this depends on the type of drug test. read more
Peak levels of THC in blood plasma are reached with five to 10 minutes after consumption. After that, blood levels of THC begin to decline and other metabolites become more abundant. Peak THC-COOH is reached 81 minutes after consumption. If being blood tested for this metabolite, you can trust that it will hang around a bit longer than the THC itself. read more