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The maleate salt form of prochlorperazine, a synthetic, piperazine phenothiazine derivative with antiemetic, antipsychotic, antihistaminic, and anticholinergic activities. Prochlorperazine binds to and blocks the postsynaptic dopamine D2-receptor in the chemoreceptor trigger zone (CTZ) of the brain and may prevent chemotherapy-induced emesis. Prochlorperazine maleate also blocks anticholinergic and alpha-adrenergic receptors. Its antagonistic actions on the alpha-1 adrenergic receptors results in sedation, muscle relaxation, and hypotension. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C775\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C775\' NCI Thesaurus)
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