Study of ALTO-300 in MDD

Purpose

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

Condition

  • Major Depressive Disorder

Eligibility

Eligible Ages
Between 18 Years and 70 Years
Eligible Genders
All
Accepts Healthy Volunteers
No

Inclusion Criteria

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

Exclusion Criteria

  • 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

Study Design

Phase
Phase 2
Study Type
Interventional
Allocation
Randomized
Intervention Model
Parallel Assignment
Primary Purpose
Treatment
Masking
Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)

Arm Groups

ArmDescriptionAssigned Intervention
Experimental
ALTO-300
Participants will receive ALTO-300 capsule once daily in the evening, from Day 1 to Day 42 in double blind (DB) treatment period. Eligible participants who will enter the open-label (OL) treatment period will receive ALTO-300 capsule once daily in the evening from OL baseline until the end of OL period/early termination visit (Up to 8 weeks).
  • Drug: ALTO-300
    ALTO-300 capsule QD
Placebo Comparator
Placebo
Participants will receive matching placebo capsule once daily in the evening, from Day 1 to Day 42 in double blind (DB) treatment period.
  • Drug: Placebo
    Placebo capsule QD

Recruiting Locations

More Details

Status
Recruiting
Sponsor
Alto Neuroscience

Study Contact

Alto Neuroscience
650-200-0412
clinical@altoneuroscience.com