There's always Vicodin and Percocet once everything else gets banned. That'd give John P Walters a heart attack though..
Good luck getting any of that prescribed though. Right now, I could go to the ER carrying my own leg in my arms, and the best I would get would be "go home and take 10 Advil". I could call back the next day and tell them that didn't work, and they would then say "take 20 Advil".
It may sound silly but I've been in, and have seen very similar things happen to people. Why to they produce such pain medications that actually work if they are so afraid someone will become addicted. Aren't nicotine, alcohol, and caffeine addictive? My goodness, we are talking pain relief here.