Betel nut‐induced extrapyramidal syndrome: An unusual drug interaction

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Abstract
Two cases are described of chronic schizophrenic patients maintained on depot neuroleptics, who developed severe extrapyramidal symptoms following a period of heavy betel nut consumption. A mechanism for this effect is proposed based on the pharmacological antagonism of the anticholinergic agent, procyclidine, by the active alkaloid ingredient of the betel, arecoline.

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