<unk> s <unk>  are a group of synthetic drugs that are chemical derivatives of the parent compound alpha-methylphenethylamine, also known as<unk> . Common<unk>  includes<unk> , methamphetamine, ephedrine, pseudoephedrine, 3,4-methylenedioxymethamphetamine (MDMA), 3,4-methylenedioxyamphetamine (MDA) and 3,4-methylenedioxyethylamphetamine (MDEA).<unk>  when used illicitly has street names including ice, meth, crystal, crank, bennies, and speed. Within the group of<unk> s, there are also prescription drugs including mixed<unk>  salts, dextroamphetamine, and lisdexamfetamine.<unk>  was first synthesized in 1887 by the Romanian chemist Lazar Edeleano. It has since been used to treat a range of disorders from asthma to ADHD and illicitly for recreational purposes.<unk> s contain chemical groups including unsubstituted phenyl ring, a methyl group at the alpha-position, and primary amino group, which accounts for its psychostimulant activities.<unk>  with multiple substitutions on the phenyl ring has a hallucinogenic effect on top of the psychostimulant effect, and are categorised as the ecstasy-class drugs.<unk> s in general are sympathomimetic amine that<unk> es the central nervous system, also proven to cause insomnia, arousal, and reduced hunger. Due to its physiological and psychological effects,<unk>  has been used to suppress appetite, improve cognitive performance, as well as treating ADHD, depression, and narcolepsy.<unk> s are also known for their addictive property and widespread problem of substance abuse. The adverse effects of<unk> , especially when chronically used, include obsessive–compulsive tendencies, anxiety, paranoia, hallucinations, aggression, mania and in extreme cases,<unk>  psychosis.
Amphetamine type stimulant
Atypical antidepressant
Antipsychotic ester
Substituted amphetamine
Heterocyclic antidepressant
Synthetic cannabinoids
Tetracyclic antidepressant
Tricyclic antidepressant