Hmm i've never fallen asleep on mdma, but i've also never popped 500mg in 10 minutes. I'd never take that much as an initial dose on purpose. Maybe as a booster. >.> I ate about 700 mg about a mouth ago but rolled for 3-4+ hours between doses ranging from 150mg to 200mg with a total of 13 hours rolling. Never was I sleepy, LOL.