Study of the effect of drugs on the mind and behaviour, particularly in the context of developing treatments for mental disorders. Major psychopharmacological advances in the 20th century include the development of tranquilizers, antidepressants, lithium carbonate (for bipolar disorder), certain stimulants (including amphetamines), and antipsychotic agents such as chlorpromazine (Thorazine), fluphenazine (Prolixin), and haloperidol (Haldol).

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