How about highly dangerous and I DON'T recommend it? You should never mix MDMA with another stimulant. Plain and simple. MDMA speeds up your metabolism a little bit. Cocaine speeds it up A LOT. You mix the two and you have disaster heading your way, starting off with possible heatstroke from your metabolism producing heat that your body is not properly getting rid of and second with possible heart attack from the effects of TWO stimulants putting a tremendous amount of strain on your heart. Yes, there are people who do this and haven't died. But you certainly put yourself at a HIGH risk Why would you do that when you can just roll? It's such a great drug by itself. And a shitload less riskier than mixing it with white.