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Adjunctive Lumateperone (ITI-007) in the Treatment of Bipolar Depression: Results From a Randomized Placebo-Controlled Clinical Trial.

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OBJECTIVE This phase 3, randomized, double-blind, placebo-controlled study (NCT02600507) evaluated the efficacy and safety of lumateperone adjunctive therapy to lithium or valproate in patients with bipolar depression. METHODS Patients (18-75 years)… Click to show full abstract

OBJECTIVE This phase 3, randomized, double-blind, placebo-controlled study (NCT02600507) evaluated the efficacy and safety of lumateperone adjunctive therapy to lithium or valproate in patients with bipolar depression. METHODS Patients (18-75 years) with bipolar I or bipolar II disorder experiencing a major depressive episode (MDE), with inadequate therapeutic response to lithium or valproate, were randomized 1:1:1 to six weeks adjunctive therapy with lumateperone 28 mg (n=176), lumateperone 42 mg (n=177), or placebo (n=176). The primary and key secondary efficacy endpoints were change from baseline to Day 43 in Montgomery-Åsberg Depression Rating Scale (MADRS) Total score and the Clinical Global Impression Scale-Bipolar Version-Severity scale (CGI-BP-S) depression subscore. Safety assessments included adverse events, laboratory evaluations, vital signs, extrapyramidal symptoms (EPS), and suicidality. RESULTS Patients treated with adjunctive lumateperone 42 mg showed significantly greater improvement compared with adjunctive placebo in MADRS Total score (LS mean difference vs placebo [LSMD], -2.4; P=.02) and CGI-BP-S depression subscore (LSMD, -0.3; P=.01), while adjunctive lumateperone 28 mg showed numerical improvement in MADRS Total score (LSMD, -1.7; P=.10) and improvement in the CGI-BP-S depression subscore (LSMD, -0.3; P=.04). Adjunctive lumateperone treatment was well tolerated; treatment-emergent adverse events reported at rates >5% and twice placebo for lumateperone 42 mg were somnolence (11.3%), dizziness (10.7%), and nausea (8.5%); with minimal risk of EPS, metabolic abnormalities, or increased prolactin. CONCLUSIONS Lumateperone 42-mg treatment adjunctive to lithium or valproate significantly improved depression symptoms and was generally well tolerated in patients with MDEs associated with either bipolar I or bipolar II disorder.

Keywords: adjunctive lumateperone; depression; lumateperone; placebo controlled; treatment

Journal Title: Bipolar disorders
Year Published: 2023

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