Couple of thoughts from an old ER nurse. I keep hearing superglue mentioned in this thread please remember over the counter super glue is considered toxic in larger amts, also if the wound is not cleaned well prior to application it does a fantastic job of sealing in the germs.
There is a medical grade "superglue" called Dermabond and can be aquired by the general public. Furthermore if you use OTC superglue dont apply it with cotton or wool there is a heat producing reaction that could cause burns.
There are some great suggestions in these posts many of these things are in my kit.
I would be concened about having/using narcotic pain killers they are by script only and wandering around the back country in a drug induced stupor would be a bad idea.
The other drugs mentioned could have negative side effects depending on medical conditions you may have thus a trip to the DR with a list of questions(written down) is a great idea.
The most important tool you have when you are injured is in you head. Knowing how to deal with these problems is key, the Red Cross offers on line and classroom first aid and cpr classes it is well worth the time .