I'm getting away from the main subject, but I would just say that when finally they made a determined effort to shut me up, it was quite pleasant, and the next thing was them trying to wake me.
Sadly for me, Pethadine (probably) causes severe Anaphylaxis.
I'm not sure why or how this started but certainly is very unpleasant even with a tiny amount cut from the side of a tablet.
After the surgery, I came to with this crushing feeling on my chest and other symptoms that I recognized. They wouldn't believe that I knew what was going on and gave me nitroglycerin just in case -- I would have thought that was the opposite to what the epi-pen does. But, it all went away in a few moments.