Cocaine
Amphetamines
Synthetic cathinones (khat)
Ketamine<unk> (MDMA)
Synthetic cannabinoids
Bath salts
Synthetic cathinones (khat)
25C-NBOMe‎
Alcohol
Amphetamines
Bath salts
Cocaine<unk> Gamma hydroxybutyrate (GHB)
Heroin
Inhalant abuse
Hydrocarbon toxicity
Difluoroethane (electronics duster)
Marijuana
Phencyclidine (PCP)
Psilocybin ("magic mushrooms")
Synthetic cannabinoids
Chloral hydrate
Body packing
Hydrocarbon toxicity
Difluoroethane (electronics duster)
Ecstasy 
Cocaine
Amphetamines
Benzocaine
Synthetic cathinones 
Ketamine
Synthetic cannabinoids
Toxic alcohols