The same for Aspirin, you can never have enough Aspirin. I keep it in Fuji film containers to keep it dry and handy. Aspirin is good for any kind of pain because it thins the blood and that reduces the pain. Scuba divers should be careful to take Aspirin, because the thinner blood takes the nitrogen faster than thicker blood. Aspirin can be taken as a first aid for all kinds of infections, it actually helps to cure the infection.
Condoms are also important to have.
Let me tell you the following story. We were at a campsite at the Fish River Canyon in Namibia in south - west Africa, pretty much in the middle of nowhere, when that guy entered the laundry hut to check for a condom machine. There was none and he asked everybody for condoms being very nervous about finding some. Well my buddy had some on hand and helped him out. I think it is important to be prepared for anything.