Like you, I am perhaps overly conservative about what goes into my survival kit. Remember, though, that you are going through towns and villages every day, and you are not in some remote place without the prospect of re-supplying your first aid kit, so you really only need to carry enough potions, plasters and patches to last a day or so.
My medical kit on the Camino contained:
- prescribed medications with the scripts and letter from my doctor explaining what I was taking, how much and why.
- over the counter analgesic
- tube of iodine cream
- anti-fungal solution
- gastro-stop or similar
- rehydration salts (x4)
- blister patches, moleskin, micropore tape, adhesive plasters
- scissors, tweezers
- cotton buds (~6) and a couple of cotton balls in a small snap-lock bag
- alcohol swabs (~6)
- small crepe bandage
I toyed with carrying an antibiotic (I have done so in the past elsewhere in the world) as well as an anti-nausea drug, but in the end decided that If there were issues, I would be close enough to medical care not to have these on me.
Regards,