I'm with dragonfly. Typically the more severe the "episode" is, can last up to 2 hours. (The longest i've been "under" so to speak.) But minor or even medium episodes can last for days if not weeks. I regularly lose time because of it, so... kind of unsettling because of that. I had a medium to severe episode on Friday when i was with some mates, and everything was really sureal like it wasn't happening or i was dreaming, or... they weren't real. I remember it though, so i must've been "there" for bits and pieces of it.