My family and I don't buy much from the store anymore by way of first aid or cleaning products. A lot of medicine we are able to avoid completely as well. We use essential oils and a few other basic supplies to manufacture our own. They are much more concentrated than what you buy at the store so you can store more and use less.
Example: mouthwash, bug bites, sanitizing utensils and surfaces, cleaning basic cuts to prevent infection, soothing sore muscles....
Peppermint oil and vodka with maybe a little bit of water mixed in depending on the application.
I have some exact recipes and I'm sure VikingDad has a bunch as well. I'll post them later.
A bottle of oil this size lasts from 1-3 months in my house depending on what it's being used for.