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  • Title: A randomized, double-blind, placebo-controlled trial of pridopidine in Huntington's disease.
    Author: Huntington Study Group HART Investigators.
    Journal: Mov Disord; 2013 Sep; 28(10):1407-15. PubMed ID: 23450660.
    Abstract:
    We examined the effects of 3 dosages of pridopidine, a dopamine-stabilizing compound, on motor function and other features of Huntington's disease, with additional evaluation of its safety and tolerability. This was a randomized, double-blind, placebo-controlled trial in outpatient neurology clinics at 27 sites in the United States and Canada. Two hundred twenty-seven subjects enrolled from October 24, 2009, to May 10, 2010. The intervention was pridopidine, either 20 (n=56), 45 (n=55), or 90 (n=58) mg daily for 12 weeks or matching placebo (n=58). The primary outcome measure was the change from baseline to week 12 in the Modified Motor Score, a subset of the Unified Huntington's Disease Rating Scale Total Motor Score. Measures of safety and tolerability included adverse events and trial completion on the assigned dosage. After 12 weeks, the treatment effect (relative to placebo, where negative values indicate improvement) of pridopidine 90 mg/day on the Modified Motor Score was -1.2 points (95% confidence interval [CI], -2.5 to 0.1 points; P = .08). The effect on the Total Motor Score was -2.8 points (95% CI, -5.4 to -0.1 points; nominal P = .04). No significant effects were seen in secondary outcome measures with any of the active dosages. Pridopidine was generally well tolerated. Although the primary analysis did not demonstrate a statistically significant treatment effect, the overall results suggest that pridopidine may improve motor function in Huntington's disease. The 90 mg/day dosage appears worthy of further study. Pridopidine was well tolerated.
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