Phase 2b Study of ALTO-100 in MDD

NCT ID: NCT05712187

Last Updated: 2025-09-08

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE2

Total Enrollment

301 participants

Study Classification

INTERVENTIONAL

Study Start Date

2023-01-10

Study Completion Date

2024-10-24

Brief Summary

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The purpose of this study is to determine efficacy differences between ALTO-100 and placebo, used either as monotherapy or adjunctively to an antidepressant, related to patient characteristics.

Detailed Description

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Conditions

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Major Depressive Disorder

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Study Groups

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ALTO-100

Participants will receive ALTO-100 tablet twice daily, 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-100 tablet twice daily from OL baseline until the end of OL period/early termination visit (Up to 7 weeks).

Group Type EXPERIMENTAL

ALTO-100

Intervention Type DRUG

ALTO-100 tablet BID

Placebo DB

Participants will receive matching placebo tablet twice daily, from Day 1 to Day 42 in double blind (DB) treatment period.

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type DRUG

Placebo tablet BID

Interventions

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ALTO-100

ALTO-100 tablet BID

Intervention Type DRUG

Placebo

Placebo tablet BID

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* Have a diagnosis of moderate to severe major depressive disorder (MDD)
* At baseline, either not taking an antidepressant medication, or currently taking a single SSRI, SNRI, mirtazapine, 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
* Diagnosed bipolar disorder, psychotic disorder, or dementia
* Current moderate or severe substance use disorder
* Has a history of hypersensitivity or allergic reaction to ALTO-100 or any of its components/excipients
* Concurrent or recent participation in another clinical trial for mental illness involving an investigational product or device
Minimum Eligible Age

18 Years

Maximum Eligible Age

64 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Alto Neuroscience

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Adam Savitz, MD, PhD

Role: STUDY_DIRECTOR

Alto Neuroscience

Locations

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Site 174

Birmingham, Alabama, United States

Site Status

Site 173

Huntsville, Alabama, United States

Site Status

Site 136

Chandler, Arizona, United States

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Site 139

Little Rock, Arkansas, United States

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Site 141

Costa Mesa, California, United States

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Site 118

Fresno, California, United States

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Site 181

Imperial, California, United States

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Site 182

Oceanside, California, United States

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Site 188

Oceanside, California, United States

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Site 179

Rancho Cucamonga, California, United States

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Site 116

Sacramento, California, United States

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Site 185

Centennial, Colorado, United States

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Site 186

Brooksville, Florida, United States

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Site 204

Jacksonville, Florida, United States

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Site 205

Orlando, Florida, United States

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Site 212

Tampa, Florida, United States

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Site 213

Tampa, Florida, United States

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Site 137

Carmel, Indiana, United States

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Site 151

Baltimore, Maryland, United States

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Site 108

Jackson, Mississippi, United States

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Site 171

Jackson, Mississippi, United States

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Site 142

Lincoln, Nebraska, United States

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Site 144

Las Vegas, Nevada, United States

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Site 178

Albuquerque, New Mexico, United States

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Site 184

Brooklyn, New York, United States

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Site 180

New York, New York, United States

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Site 210

New York, New York, United States

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Site 175

Westlake, Ohio, United States

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Site 157

North Charleston, South Carolina, United States

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Site 183

Memphis, Tennessee, United States

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Site 147

Fort Worth, Texas, United States

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Site 120

Houston, Texas, United States

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Site 172

Houston, Texas, United States

Site Status

Site 121

Draper, Utah, United States

Site Status

Countries

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United States

Other Identifiers

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ALTO-100-201

Identifier Type: -

Identifier Source: org_study_id

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