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Completed Phase 2 Interventional Results available

A Study to Evaluate 3 Dose Levels of Luvadaxistat of Adults With Negative Symptoms of Schizophrenia

ClinicalTrials.gov ID: NCT03382639

Public ClinicalTrials.gov record NCT03382639. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

ClinicalTrials.gov public records Last synced Oct 19, 2026, 3:36 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

A Phase 2, 12-Week, Randomized, Double-Blind, Placebo-Controlled, Parallel Study to Evaluate Efficacy, Safety, Tolerability, and Pharmacokinetics of 3 Dose Levels of TAK-831 in Adjunctive Treatment of Adult Subjects With Negative Symptoms of Schizophrenia

Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

The purpose of this study is to determine whether add-on luvadaxistat is superior to placebo on the Positive and Negative Syndrome Scale Negative Symptom Factor Score (PANSS NSFS).

Study identification

NCT ID
NCT03382639
Recruitment status
Completed
Study type
Interventional
Phase
Phase 2
Lead sponsor
Neurocrine Biosciences
Industry
Enrollment
256 participants

Conditions and interventions

Conditions

Interventions

Drug

Eligibility (public fields only)

Age range
18 Years to 60 Years
Sex
All
Healthy volunteers
Healthy volunteers not accepted

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date
Jan 4, 2018 (Actual)
Primary completion
Dec 29, 2020 (Actual)
Completion
Jan 12, 2021 (Actual)
Last update posted
Feb 28, 2024

2018 – 2021

United States locations

U.S. sites
16
U.S. states
10
U.S. cities
16
Facility City State ZIP Site status
Collaborative Neuroscience Network, LLC Garden Grove California 92845 —
Synergy Clinical Research Center Lemon Grove California 91945 —
Semel Institute for Neuroscience and Human Behavior Los Angeles California 90048 —
Excell Research Oceanside California 92056 —
NRC Research Institute Orange California 92868 —
Artemis Institute for Clinical Research, LLC San Diego California 92103 —
Connecticut Mental Health Center - Yale University New Haven Connecticut 06519 —
Atlanta Center for Medical Research Atlanta Georgia 30331 —
Augusta University Augusta Georgia 30912 —
The Dr. Alan & Diane Breier Prevention and Recovery Center for Early Psychosis Indianapolis Indiana 46202 —
Center for Behavioral Health, LLC Gaithersburg Maryland 20877 —
Cherry Health Grand Rapids Michigan 49503 —
Manhattan Psychiatric Center New York New York 10027 —
Research Strategies of Memphis, LLC Memphis Tennessee 38119 —
Community Clinical Research, Inc. Austin Texas 78754 —
Core Clinical Research Everett Washington 98201 —

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

Non-U.S. locations

This page focuses on the U.S. directory. The official record also lists 38 non-U.S. sites.

About this trial record page

What this page shows
Public field values for ClinicalTrials.gov record NCT03382639, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do
No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from
Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh
Last update posted Feb 28, 2024 · Synced Oct 19, 2026

Related: full search, browse by condition, browse by drug or therapy, browse by sponsor, browse by U.S. city.

Open the official record

The complete public registry record, listed eligibility criteria, and available contact information for NCT03382639 live on ClinicalTrials.gov.

View official ClinicalTrials.gov record →