Definition of "antipsychotic drug" []

• Any of a group of drugs, such as the phenothiazines or butyrophenones, that are used to treat psychosis. Also called major tranquilizer, neuroleptic. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The twenty-five-year-old Purdy, who murdered five children and wounded thirty, had been on amitriptyline, an antidepressant, as well as the antipsychotic drug Thorazine.12"
• "Dorsey's study looked mainly at atypical antipsychotic drug use -- meaning second-generation drugs. olanzapine and paliperidone, according to background information with the study."