Ever wonder what happened to the drugs of yesteryear? Even the most mind-altering substances don't always stick around.
Not only do prescriptions get taken off the market, certain recreational drugs seem to drop off the face of the planet once their hey-day has come and gone. Usually, their dangerous side effects are to blame for their demise.
[seealso slug=marijuana-america/]
These popular drugs in history may have fallen off the radar, but they're not completely forgotten.