Pergolide monotherapy in the treatment of early PD: a randomized, controlled study. Pergolide Monotherapy Study Group.
1999
OBJECTIVE:To determine whether pergolide monotherapy provides symptomatic relief in early PD. BACKGROUND:Early treatment with dopamine agonists may reduce the risk of motor fluctuations, which are most likely linked to levodopa therapy. Pergolide, a D1-D2 dopamine agonist, has been studied as "add on" therapy in PD, but no controlled clinical trial studying the efficacy of pergolide monotherapy is available. METHODS:The efficacy and tolerability of pergolide were evaluated in a multicenter, double-blind, randomized, parallel-group, 3-month trial versus placebo. Patients with a diagnosis of idiopathic PD, a modified Hoehn & Yahr score of 1 to 3, and a score greater than 14 points on the Unified Parkinson's Disease Rating Scale (UPDRS) part III at baseline were enrolled in the study (pergolide, n = 53; placebo, n = 52). RESULTS:Patient characteristics at study entry were comparable in the two study groups. The pergolide group showed a significantly greater percent of responders (defined as a -30% decrease in UPDRS part III score at end point) compared with placebo (57% versus 17%; p < 0.001). Pergolide-treated patients experienced a significantly greater improvement than placebo-treated patients (p < 0.001) in UPDRS (overall, part II, and part III) score, Schwab & England score, and Clinical Global Impression improvement score. By the study end the mean dose of pergolide was 2.06 mg/day. Six patients in the pergolide group versus two patients in the placebo group discontinued the study because of treatment emergent side effects. CONCLUSION:This study suggests that pergolide monotherapy may be an efficacious and well-tolerated first-line treatment in patients with early-stage PD.
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