I'd add ibuprofen. Pain killer and anti-inflammatory. Helps reduce swelling when you've hiked harder than you're conditioned for.
I'll second this. Also, it's good to have in case of a minor sprain. A large-ish dose has been a life saver the morning after a twisted ankle when I had another march ahead of me.
Just don't take a REALLY large dose; be educated about what is and isn't safe. Too much ibuprofen can be harmful, and I don't mean *way* too much.