However, the trials were small and of short duration meaning that the results of the meta-analysis are not robust.
Tardive dyskinesia is a late side-effect of neuroleptic treatment.
It is an involuntary movement disorder, mainly of the tongue, lips, jaw, facial musculature and trunk. There is no known treatment. Authors of included studies were contacted. Data from placebo controlled trials were combined in a meta-analysis. Only one study was of more than 12 weeks duration.