Getting good painkillers is a problem, due to the misuse of narcotics. In the United States, we are pretty much limited to aspirin, Tylenol and similar medications. Now I am not putting these down they are useful medications and have a place in our kits.
But what can we do if we need something stronger and a doctor is not available. If you live in Canada, you can get aspirin with codeine and Tylenol with codeine over the counter without a prescription. Just ask for aspirin with codeine or Tylenol with codeine at any pharmacy.
If you are traveling in Canada, you can purchase them. The problem comes when you try to bring them back over the border. I have not been able to get a straight answer as to whether or not you can bring them back into the US. I would suggest checking with the US Customs services regarding legal imports into the US.
Another possibility is acupressure; a few weeks ago, I was sent an article in the Wall Street Journal and was a bit skeptical until I recently saw a traditional Chinese Doctor perform it. It worked, here is the article. http://online.wsj.com/article/
I am currently looking for other alternate methods of pain relief that could be used in an emergency. If you have information to share it would be appreciated.