Compazine (prochlorperazine ... injection into a large muscle or an intravenous (IV) infusion into a vein. The recommended dosage, measured in milligrams (mg), varies by the drug formulation ...

May potentiate phenytoin; monitor for toxicity. Adjust anticonvulsant doses. May antagonize oral anticoagulants. Hypotension potentiated with thiazide diuretics. Antagonized by anticholinergics.