Today it's marijuana, before it was alcohol. The idea behind prescription for illicit substance for their "medicinal" quality is quite old: it was around during Prohibition [wiki]!
Tokyoflash Treasure Hunt - Win a Tokyoflash Watch of Your Choice!
Going on right now: Tokyoflash Treasure Hunt #26. Win a Tokyoflash watch and neat stuff from the NeatoShop. It's fun and easy to play: Link