Chemical classes of psychoactive drugs - Subcategories

Thiopropamines Xanthines Phenethylamines Tryptamines Alkyl nitrites Isotryptamines Substituted amphetamines Diphenylbutylpiperidines Tropanes Tricyclic antidepressants Tetracyclic antidepressants Benzodiazepines Barbiturates Thiobarbiturates 2C (psychedelics) 25-NB (psychedelics) Modafinil analogues Lysergamides Cyclopyrrolones Racetams Pyrazolopyrimidines