Cocaine Tooth Drops
It’s hard to imagine a time when cocaine was casually used for tooth drops. This ad claims it was an instantaneous cure, and only priced at 15 cents. There’s no way they would casually advertise cocaine toothdrops nowadays, considering how illegal and dangerous it is. This probably explains why a lot of people were missing teeth back then since the drops did nothing more than soothe the pain instead of fixing the underlying issue (via Reddit).