Last time I went in to get cut, I ended up going back in 5 days later as the site started bleeding. I'm general non-reactive to most pain meds (when it starts hurting I'll keep hitting the button/take more pills) with it generally making me feel tired more than anything else, so I then sleep through most of the pain. Since I was readmitted and not in post op, I didn't get the morphine drip again, but got demoral shot through the iv. Wow. First time I can say I've actually noticed immediate effects as I could instantly feel my entire body start to get tingly feeling and all that good stuff. My revisit lasted 3 days, at the end of day 2 they shifted from demoral injections (one of the reason for the new bleeding and readmission was I wasn't responding enough to previous pain med given after first discharge) to demoral pills. It still did a good job keeping the pain out, but wasn't nearly the whole body effect.
Got a couple bottles of oxy after shredding some elbow tendons recently, does a good job as a pain block but otherwise does nothing for me, no idea why people are so enamored with it.
As for post recovery muscle control, oh yes indeed. As a kid ended up in a full body cast with a broken femur. Was so happy when they finally cut it off I hopped right off the gurney when the doc said to test how it feels. I stood up for about .03 seconds, as I held me weight for just as long as it took my toes to hit the floor and then the entire leg crumbled on me.