Alcohol or other CNS depressants May result in increased CNS depression and may precipitate dystonic reactions.
Anticholinergics May reduce therapeutic effects of prochlorperazine and worsen anticholinergic effects.
Barbiturate anesthetics Frequency and severity of neuromuscular excitation and hypotension may be increased.
Beta-blockers May result in increased plasma levels of beta-blocker and prochlorperazine.
Cisapride, sparfloxacin The risk of life-threatening cardiac arrhythmias, including torsades de pointes, may be increased.
Guanethidine Hypotensive action of guanethidine may be inhibited.
Metrizamide Possibility of seizure may be increased when subarachnoid metrizamide injection is used.
Paroxetine Plasma levels of prochlorperazine may be elevated, increasing the risk of adverse reactions.
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