Yes you can buy from pharmacies in Spain and every town has one but knowing my luck I will get caught out between towns on a Sunday when everything is closed.
I plan on taking the following first aid/ medical items:
x2 povidone iodine wipes
small sterile sealed blade (yes I know how and when to use)
a square of gauze
a couple of island dressings
couple of hydrocolloid dressings
fixomull
couple of qtips
couple of gel toe sleeves
couple of ibuprofen
couple of panadol
couple of immodium
couple of sachets of salt
couple of glucose lollies
couple of electrolytes
tea tree oil
silic 15
hikers wool