For as much doubt as people have about the modern medical industry, there was a time when people would guzzle down just about any random snake oil offered up by someone who could slip on a white coat or a top hat. Those were the days of codeine laced potions, Lysol-based feminine hygiene products and snake oil that would cure just about anything, despite the lack of scientific efficacy.
If you go to the deep south, you will find Voodoo shops and other black magic purveyors selling potions of all makes and types. Guzzling them down with reckless abandon is supposed to grant you money, success, good luck, sexual prowess, or any of the other things people hope for. They rarely work, and usually look just like this Potion Specimen Bottle Prop.