Passage of the Staggers-Dodd bill (Public Law 90-639) bans possession of psilocybin and psilocin. This law amended the Food, Drug, and Cosmetic Act.
US Bans Posession of Psilocybin and Psilocin
Staggers-Dodd bill is passed, banning the possession of psilocybin and psilocin in the US.