Abstract
Atypical antipsychotics are effective in the treatment of bipolar I disorder. In this 3-week double-blind study, the efficacy and safety of paliperidone extended-release (ER) tablets were assessed in patients with acute mania. Patients experiencing a manic or mixed episode (Young Mania Rating Scale [YMRS] total score ≥20), were randomly assigned to 1 of 3 fixed doses of once-daily paliperidone ER (3, 6, or 12-mg), or placebo (1:1:1:1 ratio). In total, 469 patients were randomly assigned to treatment with paliperidone ER 3mg (n=112), 6 mg (n=120), or 12 mg (n=115); or placebo (n=122). Mean (SD) change in YMRS total score from baseline to the 3-week endpoint (primary variable) was statistically significantly different for the paliperidone ER 12 mg group (-13.5 [9.17], p=0.025), but not the 6 mg (-11.4 [9.98], p=0.57) or 3mg (-9.1 [11.18], p=0.79) groups compared with placebo (-10.1 [10.21]). Headache was the most common treatment-emergent adverse event (17% total paliperidone ER versus 12% placebo). A statistically significant (p=0.0032) treatment-by-country interaction occurred, which confounded interpretation of study results. Paliperidone ER and placebo did not differ statistically for the primary efficacy variable among patie...Continue Reading
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