Please describe the most effective way to pass a drug test?

Stop using: Depends on your body, the substance you use, the amount you use daily and possibly your liver and kidney function, and the type of drug test (whether urine, blood, sweat, saliva or hair). If you have an addiction problem, please seek help for same asap rather than worrying about how to get a clean drug test. Life is too short to live it in the haze of addiction.