Here is a wiki page on drugs whose mechanism of action is unknown: https://en.m.wikipedia.org/wiki/Category:Drugs_with_unknown_mechanisms_of_action https://en.m

Here is a wiki page on drugs whose mechanism of action is unknown: https://en.m.wikipedia.org/wiki/Category:Drugs_with_unknown_mechanisms_of_action https://en.m.wikipedia.org/wiki/Category:Drugs_with_unknown_... This tells us why many species have found herbal stuff to alleviate pain, cure ailments, etc.