Schedule I Hallucinogens (e.g., LSD, psilocybin)

Schedule I hallucinogens are classified as having a high potential for abuse, no accepted medical use in treatment in the United States, and lack safety under medical supervision; they are illegal to manufacture, distribute, or possess. Examples include lysergic acid diethylamide (LSD) and the naturally occurring compound psilocybin found in certain mushrooms.