anesthesia
"I recently had a colonoscopy and when I woke up I felt fine. I've had this drug with a previous colonoscopy and had no problems whatsoever. several days after the procedure I my vision was blurred and I was seeing double. My heart felt like it was racing so I took my blood pressure and it was elevated despite being on blood pressure meds. I also had three separate weird events happen that day that are hard to describe. I finally concluded that they were some type of hallucinations. My vision still isn't perfect and it has been several weeks. Fortunately the hallucinations have ceased. Not sure I would want to have this drug again."