ChEBI: Methamphetamine is a member of the class of amphetamines in which the amino group of (S)-amphetamine carries a methyl substituent. It has a role as a neurotoxin, a psychotropic drug, a central nervous system stimulant, a xenobiotic and an environmental contaminant. It is a member of amphetamines and a secondary amine. It derives from a (S)-amphetamine. It is a conjugate base of a methamphetamine(1+).NCI Thesaurus (NCIt): Methamphetamine is an amphetamine with central nervous system (CNS) stimulating activity. Methamphetamine acts by both facilitating the release of catecholamines, particularly noradrenaline, dopamine and serotonin, from nerve terminals in the brain and by inhibiting their uptake. This leads to an increase in synaptic concentration of these neurotransmitters and results in increased stimulation of postsynaptic receptors.