Fuck Yeah it works on all Stimulants...RC's, 2C's, Speed, Meth, Cocaine, MDA, MDMA, LSD. Magnesium Oxide naturally relaxes muscle tissue. Always preload with Magnesium up to a day ahead of time, but as little as an hour before dosing. I always preload with Vitamin C and Magnesium 500mg for a day up to 1 hour before dosing and post load with Magnesium tablet 250mg and an antidepressant with MDMA and MDA. I hate Gurning. It looks ridiculous, lol.