How much are you willing to carry, and what do you want to prepare for?
My standard first aid kit which I bring on most trips is rather small, but it's tailored for the most common situations and one or two more serious situations which can easily be helped. IME, the most common things to prepare for are blisters, minor pains and headaches, scrapes and cuts. So, I carry some ibuprofen and/or paracetamol/acetaminophene tablets, a small sortiment of band-aids, 2-3 compeed blister plasters, a small roll of gauze, a small roll of surgical tape, a few antiseptic wet wipes for wound cleaning, a pack of Steristrips (for deeper cuts) and a field dressing bandage pack (in case someone has a major wound). All of this fits into a small ~10x10x3cm waterproof pouch. In addition, I usually carry with me a warm garment and a wind/waterproof blanket of some kind (basically for my own comfort, but very useful in an emergency), a knife, a cell phone, my common sense and my basic first aid training.
I believe that that kit prepares me for 99.5% of the more probable (emergency) medical situations, perhaps except for DCS since I don't have an oxygen bottle. My ambition is to solve any issues just well enough to get back home or to the ER without unnecessary discomfort or increased damage, anything else is a task for the home medical kit or the pros.
---------- Post added February 4th, 2013 at 03:25 PM ----------
So far i have dressings, bandages, tape, foil blanket, water tubes for wound cleaning, tweezers, shears, gloves, butterfly stitches, CPR mask and DCI response check sheets.
As mentioned, I'd rather bring a few antiseptic wet wipes for wound cleaning, and I'll forgo tweezers, gloves and CPR mask. IMO, the risk of maybe having to perform CPR on a random stranger is less than the risk people usually accept when they go out on a Friday night to find someone to bring home for the night
Same thing with gloves. And the tweezers can often be substituted with the point of the knife I'm always carrying plus a little creativity :cool2:
Consider antibiotic ointment, tegaderm (waterproof dsg), superglue (works like Dermabond on very minor cuts or fissures), Ace wrap, hydrocortisone cream, Benadryl, Tylenol and ibuprofen (I also carry the same kit out of the country so I include some items that may not truly be considered "first aid").
Are you thinking of a first aid kit, or a medical kit? Those two serve slightly different purposes.
For me, first aid is what's needed to stabilize the situation until proper medical attention is available. IMO, hydrocortisone cream would be an ingredient in a traveler's medical kit rather than in a first aid kit, but of course YMMV. And since I've used Steristrips with good results, I prefer those over superglue which has a limited storage life and I have no experience with.