10002986 J Clin Psychiatry / Document Archive

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The article you requested is

Treatment of Tardive Dyskinesia With Galantamine: A Randomized Controlled Crossover Trial.

J Clin Psychiatry 2007;68:410-415
Copyright 2007 Physicians Postgraduate Press, Inc.

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Objective: Recent evidence suggests that tardive dyskinesia may result from antipsychotic-induced damage to striatal cholinergic neurons. To test whether cholinesterase inhibitors compensate for diminished cholinergic activity, we conducted a 30-week randomized, double-blind, placebo-controlled crossover trial of galantamine in patients with tardive dyskinesia.

Method: Patients with tardive dyskinesia were recruited between June 2001 and June 2004. After a 2-week baseline period, 35 male schizophrenia patients, on stable doses of antipsychotics, were randomly assigned to receive galantamine (8-24 mg) or placebo for two 12-week phases separated by a 4-week washout period. Patients were evaluated every 2 weeks for changes in extrapyramidal symptoms and before and after each treatment for effects on psychiatric symptoms and cognition.

Results: Galantamine reduced mean total Abnormal Involuntary Movement Scale (AIMS) scores more than placebo, but this difference was not statistically significant (p = .08). However, patients initially randomly assigned to galantamine showed a reversal of AIMS scores after switching to placebo. Simpson-Angus Scale ratings of parkinsonism were significantly higher with galantamine than placebo (p = .0005) and correlated with age. There were no significant differences between groups in akathisia, cognition, or psychiatric symptoms. More patients dropped out while receiving galantamine, but this outcome did not significantly influence the results

Conclusions: In contrast to previous reports, reductions in tardive dyskinesia associated with galantamine were not statistically significant compared with placebo in this trial. However, galantamine was associated with a modest rebound in dyskinesia scores after discontinuation and clinically minor but statistically higher ratings of parkinsonism. These findings support the need for further investigations of cholinergic mechanisms underlying tardive dyskinesia and extrapyramidal effects of cholinesterase inhibitors when used in combination with antipsychotics in susceptible patients.