Treatment of Persistent Phenothiazine-induced Oral Dyskinesia

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Abstract
Since the first description of persistent oral dyskinesia following phenothiazine treatment by Sigwald in 1956 a good deal of evidence has accumulated indicating the regular occurrence of this syndrome. However there is a disagreement over its incidence and the aetiological role played by phenothiazine drugs. Kline (1968) in a recent review found a total of 114 cases of ‘irreversible’ oral dyskinesia and concluded that the incidence had been misrepresented since less than two dozen of these recorded cases were previously non-brain damage.