A reply over three years later but I was so relieved to find this thread.  These are my notes from my colonoscopy in 2016.

I had a colonoscopy carried out yesterday. The report details that I had Fentanyl (IV) 100ug and Midazolam (IV) 2mg. I wasn't at all nervous about the procedure and settled down comfortably on my side as instructed. What followed was the stuff of nightmares. I felt as if I was being disembowelled by a butcher's hook. I remember writhing about on the trolley and the nurse pressing hard on my stomach. I was crying out and saying that I couldn't stand the pain. It seemed to go on for such a long time, the nursing staff were kind and constantly trying to soothe me, the doctor said nothing at all. The amnesia effect only kicked in when I was taken to the recovery room. My husband came to pick me up, and I chatted quite happily to him, and the nurse told him that my pain wasn't usual. Then, over the next eight hours, I was awake all night and everything came back to me, in the most disjointed way - the horror of feeling utterly trapped and helpless, the excruciating pain and terrible sensations.  The information leaflet I was given prior to the procedure said I might experience 'some discomfort'.

I looked up Midazolam injection is used before medical procedures and surgery to cause drowsiness, relieve anxiety, and prevent any memory of the event.  It certainly didn't work with me.

What went a long way to helping me recover was the consultation I had with the head consultant later.  He was so gracious and caring, and even wrote to my doctor telling him about my experience.  I felt, albeit after the event, that I had been taken seriously.
 

A reply over three years later but I was so relieved to find this thread.  These are my notes from my colonoscopy in 2016.

I had a colonoscopy carried out yesterday. The report details that I had Fentanyl (IV) 100ug and Midazolam (IV) 2mg. I wasn't at all nervous about the procedure and settled down comfortably on my side as instructed. What followed was the stuff of nightmares. I felt as if I was being disembowelled by a butcher's hook. I remember writhing about on the trolley and the nurse pressing hard on my stomach. I was crying out and saying that I couldn't stand the pain. It seemed to go on for such a long time, the nursing staff were kind and constantly trying to soothe me, the doctor said nothing at all. The amnesia effect only kicked in when I was taken to the recovery room. My husband came to pick me up, and I chatted quite happily to him, and the nurse told him that my pain wasn't usual. Then, over the next eight hours, I was awake all night and everything came back to me, in the most disjointed way - the horror of feeling utterly trapped and helpless, the excruciating pain and terrible sensations.  The information leaflet I was given prior to the procedure said I might experience 'some discomfort'.

I looked up Midazolam injection is used before medical procedures and surgery to cause drowsiness, relieve anxiety, and prevent any memory of the event.  It certainly didn't work with me.

What went a long way to helping me recover was the consultation I had with the head consultant later.  He was so gracious and caring, and even wrote to my doctor telling him about my experience.  I felt, albeit after the event, that I had been taken seriously.