Are you asking if it would show up on a drug test or if you would still be feeling it? I don't know about the test, but from my experience, x only lasts a few hours. The longest I had it last was 6 hours. But if you have a pill that really isn't x, or has some type of speed in it, it could keep you up all night. I've had that happen to me before. But if it is real MDMA, you would be ok by the next day, except maybe a little tired or depressed.
