According to the U.S. Drug Enforcement Administration, “Schedule I drugs, substances or chemicals are defined as drugs with no currently accepted medical use and a high potential for abuse.” Examples are: heroin, lysergic acid diethylamide (LSD), marijuana (cannabis), 3,4-methylenedioxymethamphetamine (ecstasy), methaqualone and peyote.

The DEA website explains: “Drugs, substances and certain chemicals used to make drugs are classified into five distinct categories or schedules depending upon the drug’s acceptable medical use and the drug’s abuse or dependency potential. The abuse rate is a determinate factor in the scheduling of the drug…”