How long are toxins in the urine or blood?
A. Most medications and over the counter drugs are out of the system in 48 to 72 hours however, Marijuana, (THC) has a half-life of seven days per use and can stay in the urine much longer than the blood. The presence of THC can be detected in the urine 45-60 plus days if used heavily such as three times a week or more.