Life sciences · Phase 2 Trial
ClinicalTrials.gov · October 13, 2026
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Phase 2 Trial.
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Registry record from ClinicalTrials.gov (NCT06656416). This is a study registration, not published results. Lead sponsor: Alto Neuroscience. Recruitment status: RECRUITING. Phase: PHASE2. Study type: INTERVENTIONAL. Enrollment: 200 participants (ESTIMATED). Conditions: Bipolar Disorder I or II With a Major Depressive Episode. Interventions: DRUG: ALTO-100; DRUG: Placebo. Primary outcome measures: To assess efficacy of ALTO-100 versus placebo on depression symptoms in bipolar disorder in a pre-defined subgroup of participants as measured by the mean change from Day 1 to Week 6 on the Montgomery-Åsberg Depression Rating Scale (MADRS) total score , Change assessed from Day 1 to Week 6. Brief summary: The purpose of this study is to assess antidepressant efficacy differences between ALTO-100 and placebo during the Double-Blind period in patients with bipolar disorder I or II with current major depressive episode, when used adjunctively to a mood stabilizer and/or atypical antipsychotic, related to patient characteristics. Additionally, safety, tolerability, and efficacy will be assessed in a subsequent open label treatment period.