Propofol
"Went in for an endoscopy/colonoscopy procedure.  All went well until I woke up uncontrollably crying which was really, really awful!  My poor husband didn't know what to do and the nurses told me that this happens in some patients (younger patients)  and would go away.  I am 52.  I would have like to have been warned ahead of time that this could happen.  The good news is that it passed after about a half hour, but made me never want to use this drug again.  In the past, have had versad (sp?) with great results so wasn't worried going in, thinking I would have that again."