More than a week, and none of the magic stuff you hear about on the Net actually works. Water is the best flushing agent.
How Long Does It Take To Flush Marijuana Out Of Your System Before A Drug Test?
Drinking 2 gallons of water a day or two before your drug test will clean your system out quick
or you can drink cranberry juice and take a shot of vinegar.
or you can drink cranberry juice and take a shot of vinegar.
It depends on the person....I think a week or 2 is the most common.