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Information about Prochlorperazine

Prochlorperazine is a phenothiazine used primarily as an antiemetic agent.


Liver safety of Prochlorperazine

In rare instances, prochlorperazine can cause clinically apparent acute and chronic cholestatic liver injury.

Mechanism of action of Prochlorperazine

Prochlorperazine (proe" klor per' a zeen) is a tricyclic aliphatic phenothiazine which acts by postsynaptic inhibition of dopamine receptors. Prochlorperazine has other peripheral and central nervous system effects, producing both alpha adrenergic stimulation and blocking histamine- and serotonin-mediated effects. Prochlorperazine is indicated primarily for the therapy of nausea and vomiting.

Prochlorperazine's 3D molecular structure
Prochlorperazine's 3D molecular structure

Other clinical effects

Prochlorperazine also has antianxiety and antipsychotic effects, but is used less commonly for these indications compared to the major phenothiazines such as chlorpromazine, fluphenazine, perphenazine, thioridazine and trifluoperazine.

FDA approval

Prochlorperazine was FDA approved for use in the United States in 1956 and is still widely used in therapy of nausea and vomiting.

Prochlorperazine 5mg
Prochlorperazine 5mg


Prochlorperazine is available in generic forms as tablets of 5, 10 and 25 mg, in long acting capsules of 15 mg, as an oral solution of 5 mg/ 5 mL, as suppositories of 2.5, 5 and 25 mg, and in parenteral forms.

Brand names

Prochlorperazine is also available under the brand names of Compazine and Compro.

Dosage and administration for Prochlorperazine

Typical doses for nausea are 5 to 10 mg three to four times daily.

Side effects of Prochlorperazine

Common side effects are similar to other phenothiazines and include drowsiness, dizziness, headache, blurred vision, dry mouth, constipation, tremor, restlessness, muscle spasms and weight gain.

Antipsychotic agents

First Generation

Second Generation (Atypicals)

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Reviews for Prochlorperazine

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