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Chlorpromazine (Chlorpromazine Hydrochloride) - Description and Clinical Pharmacology

 
 



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DESCRIPTION

Chlorpromazine HCl is chemically designated as 2-Chloro-10-[3-(dimethylamino)propyl]-phenothiazine monohydrochloride and has the following structural formula:

                                      C H ClN S • HCl                 MW 355.33 17 19 2

Chlorpromazine Hydrochloride Injection, USP is a sterile aqueous solution intended for deep intramuscular use. Each mL contains chlorpromazine hydrochloride 25 mg, ascorbic acid 2 mg, sodium metabisulfite 1 mg, sodium sulfite 1 mg and sodium chloride 6 mg in Water for Injection. pH is 3.4-5.4.

CLINICAL PHARMACOLOGY

The precise mechanism whereby the therapeutic effects of chlorpromazine are produced is not known. The principal pharmacological actions are psychotropic. It also exerts sedative and antiemetic activity. Chlorpromazine has actions at all levels of the central nervous system—primarily at subcortical levels—as well as on multiple organ systems.

Chlorpromazine has strong antiadrenergic and weaker peripheral anticholinergic activity; ganglionic blocking action is relatively slight. It also possesses slight antihistaminic and antiserotonin activity.

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