A hiccup is a myoclonic jerk of the diaphragm, and cases of hiccups may last for more than 48 hours (persistent hiccups) or even more than 2 months (intractable hiccups). Indeed, dyskinesia after chlorpromazine (up to 75 mg/day for 4 wks), as well as somnolence and dyskinesia after haloperidol …

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