anesthesia
"I was given versed   propofol to sedate me for an upper endo.  I have Asperger's, so I was very nervous about any sensory issues the medicines might cause, and also concerned with being nauseous, so the anesthesiologist gave me Zofran to ward off any nausea. When I was taken back to the OR, The CRNA injected me with a tiny bit of versed just to relax me.  I was rolled onto my side, they put the oxygen tube in my nose, and then the CRNA pushed the rest of the versed and then the propofol, and I was out like a light!  I woke up in the recovery area and I felt fine.  I had a bit of double vision at first, but that wore off after 2-3 mins. Also, I could not stop laughing. Slight stuffy nose like others have mentioned. Not a bad experience!"