1988 UN Convention against Illicit Traffic in Narcotic drugs and Psychotropic SubstancesTable 1 (Controlled Precursors) Ephedrine1961 UN Single Convention on Narcotic Drugs as amended by the 1972 ProtocolSchedule 1CannabisCoca Leaf CocaineHeroin MorphineOpiumSchedule 2CodeineSchedule 4Heroin1971 UN Single Convention on Psychotropic SubstancesSchedule 1MDMA (Ecstasy)THC (Tetrahydrocannabinol)Schedule 2AmphetamineMetamphetamineSchedule 4 DiazepamGHB (Gamma-hydrobutyric acid)