How Long Does Thc Stay In Urine 2024 In Usa. To understand how long does weed stay in your system after a couple of puffs, we’re using our calculator to simulate thc in the system after smoking one joint. After weed enters your system, it can take between one to three hours to feel the complete effects and another one to three hours for those effects to.
Regular cannabis users may have elevated thc levels even after a period of abstinence. 16 days after passing the 50 ng/ml drug test is more than enough time for the thc levels in your blood (and.