Like Mary D, I just finished a 16 hour wilderness first aid class. What I learned is the same as what she says. To her list I would definitely add some tablets and medications, which might save the day, provide comfort, or save a life. One chewable aspirin can save a life, and the weight is negligible. Ibuprofin, acetominiphen, steristrips, immodium, pepto, kaopectate, benadryl, 3 in one antibacterial ointment, aloe burn gel (tiny pack), moleskin, breathing barrier, are on my list. Being diabetic I also take a round of antibiotics, and use them on most trips due to infected blisters or cuts.
If the meds are for someone other than you, you don't "administer" them. You make them available if the patient wants to give it a try. I don't know the statistics, but I'll bet you are far more likely to save a life than lose one by sharing an aspirin.
My MSR hyperflow water filter on backflush is good for irrigating wounds. Some 4 x 4 sterile pads don't weigh much, and the vet tape is reusable so its very weight effective. I have tweezers, and a pair of gloves are very lightweight for bodily substance barrier. Add moleskin, and athletic tape.
If you are just preparing to treat yourself, you probably only need moleskin and bandaids, but you never know, and it doesn't add much in weight to add a lot more capability.