An interesting idea about ...."Aspirin." If discovered today, it would cost 5 to 10 dollars a Pill.

[PufPuf23]

6. Native cultures used Salix (willow) bark for similar uses'

One could get a book with instructions to prepare willow bark for aspirin-like use.

"A precursor to aspirin found in the bark of the willow tree (genus Salix) has been used for its health effects for at least 2,400 years.[10][11] In 1853, chemist Charles Frédéric Gerhardt treated the medicine sodium salicylate with acetyl chloride to produce acetylsalicylic acid for the first time.[12] Over the next 50 years, other chemists established the chemical structure and devised more efficient production methods"
https://en.wikipedia.org/wiki/Aspirin