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RecruitingMajor Depressive Disorder

Study of ALTO-300 in MDD

Eligible age

18–70 yrs

Accepts

All genders

Locations

21 states

Healthy volunteers

No

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About this study

The purpose of this study is to determine efficacy differences between ALTO-300 and placebo, used adjunctively to an antidepressant, related to patient characteristics.

Sponsor: Alto Neuroscience

You may qualify if…

  • Have a diagnosis of moderate to severe major depressive disorder (MDD)
  • At Visit 1, currently taking a single SSRI, SNRI, or bupropion for at least 6 weeks with no dose modifications in the past 2 weeks by Visit 2
  • Willing to comply with all study assessments and procedures
  • Must not be pregnant or breastfeeding at time of enrollment or throughout study

You may not qualify if…

  • Evidence of unstable medical condition
  • Nightly use of sleep medication
  • Diagnosed bipolar disorder, psychotic disorder, or dementia
  • Current moderate or severe substance use disorder
  • Has a history of hypersensitivity or allergic reaction to ALTO-300 or any of its components/excipients
  • Concurrent or recent participation in another clinical trial for mental illness involving an investigational product or device

Where it's recruiting

Arizona

Phoenix · Yuma

Arkansas

Rogers

California

Bellflower · Glendale · Lafayette · Los Angeles

Colorado

Colorado Springs · Evergreen

Florida

Clermont · Miami Gardens · Miami Lakes · Okeechobee

Georgia

Savannah · Snellville

Idaho

Boise

Illinois

Chicago

Louisiana

Marrero · Monroe

Nevada

Las Vegas

Source: ClinicalTrials.gov · NCT05922878 · last updated 2025-07-24

Study of ALTO-300 in MDD · TrialPath