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BackgroundMavoglurant (AFQ056), a selective metabotropic glutamate receptor 5 (mGluR5) inhibitor, was tested for t levodopa-induced dyskinesia (LID) in patients with Parkinson's Disease (PD). However, clinical trials showed inconsistent results regarding the efficacy of mavoglurant in treating LID in patients with Parkinson's disease (PD).MethodsA computer literature search of PubMed, Scopus, Web of science, and Cochrane CENTRAL was conducted until March 2021. We selected relevant randomized controlled trials comparing mavoglurant to placebo. Study data were extracted and pooled as mean difference (MD) in the meta-analysis model.ResultsSix RCTs were included in this meta-analysis with a total of 485 patients. Mavoglurant was not significantly superior to placebo in terms of the "off-time" (MD -0.27 h, 95% CI -0.65 to 0.11), "on time" (MD 0.29 h, 95% CI -0.09 to 0.66), Lang-Fahn activities of daily living dyskinesia scale (MD -0.95, 95% CI -1.98 to 0.07), UPDRS-III (MD -0.51, 95% CI -1.66 to 0.65), or UPDRS-IV (MD -0.41, 95% CI -0.85 to 0.03). However, the pooled modified abnormal involuntary movement scale favored the mavoglurant group than the placebo group (MD -2.53, 95% CI -4.23 to -0.82).ConclusionsThis meta-analysis provides level one evidence that mavoglurant is not effective in treating the LID in patients with PD.
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