4-5 hours i'd say is most common for most MDMA trips. The amount taken doesn't necessarily increase the time you're up rather increasing the intensity of it all. Hence why 'less is more' is often applied to it.
Really? I had what I thought was really good MDMA and the really good affects only lasted around 2-3 hours, then i was just buzzed for the rest of the time.
How can you tell when you're coming down? any signs to look for?
