Propofol
"Given propanol intravenously during a colonoscopy and had a hard time recovering. They said I started drooling and they used suction and also that my throat went into spasm. I woke with a very sore throat and headache. Once home I couldn't swallow easily, had a headache and was very groggy. My whole body ached and I took two Tylenol which did not help.  I found I was running a fever. This was about 5 hours after getting home. Started drinking lots of water and was applying wet cloths to my forehead.  I was crying and couldn't sleep. This lasted 18 hours!  Doc said never take Propofol again."