During a colonoscopy using Propofol, I stopped breathing, my body spasmed and my mouth couldn t be opened because because it was frozen shut . Finally an airway was opened through my nostrils. I was coughing and aspirated part of a capsule I had ingested before surgery. Now I am told if I get an upper respiratory infection that I must immediately be put on antibiotics or I will be susceptible to pneumonia. IL was also told that I shouldn t be afraid of being sedated with Propofol again. I was extremely lucky because my surgery team knew what to do and did it quickly. What are your thoughts on this? PS: I would NEVER use Propofol again.