as long as it is just mj your trying to get away with. certain drugs you cant flush becuz there is no "naturally occuring" levels in the body. opiods you cant flush, most speed you cant either but it's 1/2 life in body is very short. i've flushed cocaine before but thought that was luck. the home tests are actaully very accurate now. if you passed for one of those you should be golden, but some cutoff for mj is 50ng others it's 25ng. r