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  • Title: Efficacy of aripiprazole adjunctive to lithium or valproate in the long-term treatment of patients with bipolar I disorder with an inadequate response to lithium or valproate monotherapy: a multicenter, double-blind, randomized study.
    Author: Marcus R, Khan A, Rollin L, Morris B, Timko K, Carson W, Sanchez R.
    Journal: Bipolar Disord; 2011 Mar; 13(2):133-44. PubMed ID: 21443567.
    Abstract:
    OBJECTIVES: To evaluate the efficacy and safety of aripiprazole (ARI) adjunctive to lithium (Li) or valproate (Val) (ARI+Li / Val) compared with placebo (PLB) adjunctive to Li or Val (PLB+Li / Val) as maintenance therapy for patients with bipolar I disorder who had an inadequate response to Li or Val monotherapy. METHODS: Patients with a current manic/mixed episode received Li or Val for at least 2 weeks. Those with an inadequate response [Young Mania Rating Scale (YMRS) total score ≥ 16 and ≤ 35% decrease from baseline at 2 weeks] received adjunctive single-blind ARI plus mood stabilizer. Patients who achieved stability [YMRS and Montgomery-Åsberg Depression Rating Scale (MADRS) score ≤ 12] for 12 consecutive weeks were randomized to double-blind ARI (10-30 mg/day) or PLB+Li / Val. Relapse was monitored for 52 weeks. Adverse events (AEs) were also evaluated. RESULTS: A total of 337 patients were randomized to ARI+ Li / Val (n=168) or PLB+Li / Val (n=169). The Kaplan-Meier relapse rate at 52 weeks was 17% with ARI+Li / Val and 29% with PLB+Li / Val. ARI+Li / Val significantly delayed time to any relapse compared with PLB+Li / Val; hazard ratio=0.54 (95% confidence interval: 0.33-0.89; log-rank p=0.014). The most common AEs ≥ 5%(ARI+Li / Val versus PLB+Li / Val) were headache (13.2% versus 10.8%), weight increase (9.0% versus 6.6%), tremor (6.0% versus 2.4%), and insomnia (5.4% versus 9.6%). CONCLUSIONS: Continuation of ARI+Li / Val treatment increased the time to relapse to any mood episode compared with Li or Val monotherapy, and was relatively well tolerated during the one-year study. These findings suggest that there is a long-term benefit in continuing ARI adjunctive to a mood stabilizer after sustained remission is achieved.
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