Man, I am late to the party and tempted not to reply, but having first hand experience with a bad backcountry injury I guess I will offer my 2 cents, worth what you paid for it

I apologize in advance for the rerun to those who have heard the story before.
In 2010 I suffered a displaced fracture of both my tibia and fibula (lower leg bones) during a mountain goat hunt on Kodiak Island, AK. My husband and our hunting partner had to drag me 1200' vertical feet downhill to get to a place where it leveled off enough for a coast guard chopper to hover and evacuate me in a basket. We carried Vicodin in our emergency kit, and when I got hurt I took a single pain pill because they make me nauseous and I didn't want to get sick. When they first attempted to move me I almost lost consciousness, and i took a second pill right away. Even with the narcotic on board, my trip down the hill and then into the chopper was excruciating and almost intolerable. They'd drag me 50 or 100 feet and then stop when the pain got too bad and I started screaming, let me rest, and then keep going. I was at real risk for shock due to being cold and badly injured, but never due to the pain medicine. If the weather hadn't cleared enough for the helicopter to get in, I could have been looking at spending the night on the mountain with both bones in my leg dislocated.
I pray I never again need a strong pain killer in the field, but I will never NOT carry them. We typically have some on hand from dental procedures or surgeries (usually expired), and that's what we carry.
In regards to the original post, I carry OTC Tylenol and ibuprofen, Imodium, and Benadryl. Now that we backpack with our 2 year old daughter, I also carry an epipen Jr...My husband and I have never had allergies, but I would hate to discover she's allergic to bee stings or something on a remote trip.
The comment about eye drops was a good one, and I carry a couple single use eye drops as well as a 10cc syringe that could be used to irrigate with water if the need arose.