If the test are unobserved, maybe try to find out, I would recommend substituting. Then you can take your drug test high!:stoned: I was notified of my drug test 24 hrs before, so I dont really think they have to give warning. If its really important DONT rely on the drinks! They are too hit and miss! From what I see, more miss than hit! Some lab tests can detect some of those drinks. It all depends.