I don't get comedowns off it anymore, my serotonin gland is as shrivelled as ER's nutsack. Back in the day though, it ****ing hurt. If you've never had a proper mandy comedown you've never taken real mandy.
As I recall its murder on the tailbone. Something to do with the calcium trickling down, or so I was told.
It can leave you with sore bones if you take enough. Heard something similar, something to do with your marrow. But taking say 0.5g of proper MDMA will leave you ****ing reeling in the morning if you don't have a tolerance for it. I've been almost suicidal after rough nights on MDMA, sort of night where jumping off a bridge into a freezing cold torrent of water seems logical.
I've only ever had the tailbone pain, never took anything for the comedown, mind you I never used a lot of it, only took it 5 or 6 times.
Only if your MDMA is actually amphetamines, aye. If you get a pill and it makes you grind yer teeth its laced with speed. Clean MDMA won't do that. Just makes you act like a total spastic, or at least that's what it does in my case.