like the thing is that
there's a difference between drugs that are invented and discovered
when a drug is invented, this means its structure has been designed to specifically operate on a specific mechanism to do something
like, a lot of chemotherapy drugs, antibiotics, or antivirals
on the other hand, often, drugs are discovered - that is, some random thing is tested, seems somehow effective, and then goes through more testing and it turns out it actually works and that becomes a drug
nobody knows why it does but it does
>The first use of small-molecule drugs to treat cancer was in the early 20th century, although the specific chemicals first used were not originally intended for that purpose. Mustard gas was used as a chemical warfare agent during World War I and was discovered to be a potent suppressor of hematopoiesis (blood production).
oof