deckmunki
Bluelighter
The dilation only lasts while the MDMA is still in effect. You are not going to have dilated pupils the next morning.
I'm going to have to argue with you on that one (but in a nice way, not a scary way...): I have experienced mydriasis for anything up to 24 hours after last intake, and MDMA has a half life of between 6 and 10 hours (although most sources and people seem to agree that the majority of effects are gone within 6 hours).
Still, this means a large dose (probably above most people's "sensible" level) can result in MDMA levels still being at a high enough level to have some lingering effects a long time after ingestion.
Strangely, I found that around 5 hours after my last dose, sitting on the bus home and almost falling asleep, I felt like the effects had completely worn off, and my pupils were pretty normal (although I still had enough jaw tension to distort my face and scare grannies... ;o), but within ten minutes of getting off the bus and walking quickly up a mile-long hill, I started coming up again (sadly only the stimulant-like effects - there's no love to be felt at that time of the morning when your bed's miles away ;o). I wonder whether the MDMA was stored in muscle or fat tissue, and the exercise pushed it back into circulation? Odd...
Anyways, depending on your dose, body size, etc, it seems sensible to allow yourself a 24 hour recovery period after rolling, just to be on the safe side =o)
* Almost everything I've written here is probably inaccurate...