If you were prescribed the Ritalin then you have nothing to worry about. I had the same issue with my Adderal. When I was asked why I would have tested positive for stimulants, I explained it is due to the medication I take for my ADD. I also advised the testing center of this before … Read more

The MDMA itself isn't so much what you should be worried about. Unless you are getting pure gel caps, which if you are then congratulations, you should be more worried about what the tab was cut with as different drugs have different times they stay in your system.