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Showing 1–24 of 1,647 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Schizophrenia Spectrum & Other Psychotic Disorders Clear all
Completed Phase 4 Interventional Results available

DECIFER: Depression and Citalopram In First Episode Recovery

NCT01041274
View directory record Official record
Conditions
Schizophrenia, Schizophreniform Disorder
Interventions
Citalopram, Placebo, Psychoeducation, Cognitive Behavioral Therapy (CBT), Functional Magnetic Resonance Imaging (fMRI)
Drug · Behavioral · Radiation
Lead sponsor
NYU Langone Health
Other
Eligibility
16 Years to 40 Years
Enrollment
95 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 16, 2019 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Phase 2 Interventional Results available

Efficacy and Safety of Pimavanserin as Adjunctive Treatment for the Negative Symptoms of Schizophrenia (ADVANCE)

NCT02970305
View directory record Official record
Conditions
Schizophrenia
Interventions
Pimavanserin, Placebo
Drug
Lead sponsor
ACADIA Pharmaceuticals Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
403 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
33
States / cities
Phoenix, Arizona • Rogers, Arkansas • Bellflower, California + 27 more
Source: ClinicalTrials.gov public record
Updated Dec 21, 2020 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Phase 4 Interventional

An Open-label Trial of Metformin for Weight Control of Pediatric Patients on Antipsychotic Medications.

NCT00391261
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder, Schizophreniform Disorder, Bipolar Disorder, Autism Spectrum Disorders
Interventions
Metformin
Drug
Lead sponsor
Cambridge Health Alliance
Other
Eligibility
10 Years to 18 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
1
States / cities
Medford, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 24, 2010 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Phase 1 Interventional Results available

Open-label Trial Characterizing the PK of 3 SC Olanzapine Extended-release Formulations in Participants With Schizophrenia/Schizoaffective Disorder

NCT06319170
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder
Interventions
Olanzapine Extended Release, Olanzapine Immediate Release
Drug
Lead sponsor
Teva Branded Pharmaceutical Products R&D LLC
Industry
Eligibility
18 Years to 64 Years
Enrollment
106 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
5
States / cities
Los Alamitos, California • Hollywood, Florida • Atlanta, Georgia + 2 more
Source: ClinicalTrials.gov public record
Updated Jan 25, 2026 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Phase 2 Interventional

Study Evaluating SCA-136 in Subjects With Acute Exacerbations of Schizophrenia

NCT00265551
View directory record Official record
Conditions
Schizophrenia
Interventions
SCA-136 (200 mg), SCA-136 (400 mg), olanzapine (15 mg), placebo
Drug
Lead sponsor
Wyeth is now a wholly owned subsidiary of Pfizer
Industry
Eligibility
18 Years to 65 Years
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
35
States / cities
Little Rock, Arkansas • Cerritos, California • Costa Mesa, California + 29 more
Source: ClinicalTrials.gov public record
Updated Dec 9, 2007 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Not applicable Interventional Results available

Electronic Decision Support Systems for Smokers With Severe Mental Illness

NCT01412866
View directory record Official record
Conditions
Severe Mental Illness, Nicotine Dependence, Schizophrenia, Tobacco Use Disorder
Interventions
EDSS with CO feedback and health checklist, EDSS with health checklist feedback alon
Behavioral
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
18 Years to 75 Years
Enrollment
124 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Dec 11, 2018 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Not applicable Interventional Results available

Song-making In a Group (SING) R61

NCT05537428
View directory record Official record
Conditions
Schizophrenia
Interventions
Musical Intervention
Behavioral
Lead sponsor
Yale University
Other
Eligibility
18 Years to 65 Years
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jun 14, 2025 · Synced Sep 29, 2026, 6:59 PM EDT
Completed No phase listed Observational

Observational Study in Patients With Schizophrenia Treated With Long-Acting Risperidone Injection (RISPERDAL CONSTA)

NCT00246194
View directory record Official record
Conditions
Schizophrenia
Interventions
risperidone (RISPERDAL CONSTA)
Drug
Lead sponsor
Janssen, LP
Industry
Eligibility
18 Years and older
Enrollment
532 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
1
States / cities
Rockville, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 3, 2014 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

The Effects of ∆-9-THC and Naloxone in Humans

NCT01591629
View directory record Official record
Conditions
Healthy
Interventions
Naloxone, Delta-9-THC, Placebo
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 55 Years
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 8, 2022 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Phase 3 Interventional Results available

Pediatric Schizophrenia Efficacy and Safety Study

NCT01911429
View directory record Official record
Conditions
Schizophrenia
Interventions
Lurasidone 40 mg, Lurasidone 80 mg, Placebo 40 or 80 mg
Drug
Lead sponsor
Sumitomo Pharma America, Inc.
Industry
Eligibility
13 Years to 17 Years
Enrollment
327 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
36
States / cities
Dothan, Alabama • Anaheim, California • Bakersfield, California + 33 more
Source: ClinicalTrials.gov public record
Updated Apr 17, 2017 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Phase 4 Interventional Results available

Prebiotic Treatment in People With Schizophrenia - Pilot Study

NCT03617783
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder
Interventions
Prebiotin, Placebo
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 60 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Catonsville, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 14, 2023 · Synced Sep 29, 2026, 6:59 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Imaging Cannabinoid Receptors Using Positron Emission Tomography (PET) Scanning

NCT01730781
View directory record Official record
Conditions
Schizophrenia, Cannabis Dependence, Prodromal for Psychotic Illness, Family History of Alcoholism, Healthy Control, Opioid-use Disorder, Post Traumatic Stress Disorder
Interventions
[11-C]OMAR
Radiation
Lead sponsor
Yale University
Other
Eligibility
18 Years to 55 Years · Male only
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2026
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 26, 2026 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Phase 4 Interventional Results available

Comparison of a Long-acting Injectable Antipsychotic vs Clinician's Choice Early in Treatment to Break the Cycle of Relapse in Early Phase Schizophrenics

NCT02360319
View directory record Official record
Conditions
Schizophrenia
Interventions
Any FDA approved antipsychotic agent, aripiprazole long acting injectable formulation
Drug
Lead sponsor
Vanguard Research Group
Other
Eligibility
18 Years to 35 Years
Enrollment
489 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
39
States / cities
Tucson, Arizona • Granada Hills, California • Palo Alto, California + 35 more
Source: ClinicalTrials.gov public record
Updated Dec 1, 2020 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Phase 3 Interventional Results available

Long-term Study of Cariprazine in Patients With Schizophrenia

NCT01104792
View directory record Official record
Conditions
Schizophrenia
Interventions
Cariprazine
Drug
Lead sponsor
Forest Laboratories
Industry
Eligibility
18 Years to 60 Years
Enrollment
752 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
39
States / cities
Little Rock, Arkansas • Springdale, Arkansas • Carson, California + 30 more
Source: ClinicalTrials.gov public record
Updated Jul 25, 2019 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Not applicable Interventional

Evaluation of mHealth for Serious Mental Illness

NCT04068467
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder, Major Depressive Disorder, Bipolar Disorder
Interventions
Smartphone App, Waitlist Control
Other
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
315 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Aug 10, 2021 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Phase 4 Interventional Results available

Trial of Nicotine Nasal Spray as an Aid for Smoking Cessation in Schizophrenia

NCT01010477
View directory record Official record
Conditions
Smoking Cessation, Schizophrenia
Interventions
Nicotine Nasal Spray, Behavioral counseling
Drug · Behavioral
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years and older
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Sep 7, 2014 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Phase 1 Interventional

A Study of the Safety, Tolerability and Pharmacokientics of RO5545965 in Patients With Schizophrenia on Risperidone

NCT02019329
View directory record Official record
Conditions
Schizophrenia
Interventions
Placebo, RO5545965, risperidone
Other · Drug
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
18 Years to 60 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014
U.S. locations
1
States / cities
Glendale, California
Source: ClinicalTrials.gov public record
Updated Nov 1, 2016 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Phase 4 Interventional

Treating Drug-Resistant Childhood Schizophrenia

NCT00048828
View directory record Official record
Conditions
Schizophrenia
Interventions
Olanzapine, Clozapine
Drug
Lead sponsor
Northwell Health
Other
Eligibility
10 Years to 18 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2006
U.S. locations
3
States / cities
Dix Hills, New York • Glen Oaks, New York • The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Jul 1, 2013 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Not applicable Interventional

An Open-Label Pilot Trial of Alpha Lipoic Acid (ALA) for Weight Loss in Schizophrenia

NCT01355952
View directory record Official record
Conditions
Obesity, Weight Loss, Schizophrenia
Interventions
Alpha Lipoic Acid
Dietary Supplement
Lead sponsor
Yale University
Other
Eligibility
18 Years to 70 Years
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Nov 4, 2015 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Investigate the Safety, Tolerability, and Pharmacokinetics of KYN-5356 in Healthy Subjects Aged 18 to 55 Years

NCT06225115
View directory record Official record
Conditions
Cognitive Dysfunction, Schizophrenia
Interventions
KYN-5356, placebo
Drug
Lead sponsor
Kynexis B.V.
Industry
Eligibility
18 Years to 55 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Glendale, California
Source: ClinicalTrials.gov public record
Updated Dec 3, 2024 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Phase 1 Interventional

Add On Treatment for Cognitive Deficits in Schizophrenia

NCT01346163
View directory record Official record
Conditions
Schizophrenia
Interventions
PF 03654746, Placebo
Drug · Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 40 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 1, 2011 · Synced Sep 29, 2026, 6:59 PM EDT
Completed No phase listed Observational

Pediatric Bipolar Registry

NCT02360267
View directory record Official record
Conditions
Bipolar Disorder, Depression, Mania, Psychosis
Interventions
Not listed
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
6 Years to 17 Years
Enrollment
334 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2019
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 21, 2025 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Not applicable Interventional

Melatonin Effects on Sleep and Circadian Rhythm in Youth and Young Adults With At-risk Symptoms

NCT03826563
View directory record Official record
Conditions
Psychosis, Sleep
Interventions
oral melatonin tablets (NatureMade brand), Placebo
Drug · Other
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
11 Years to 30 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 8, 2023 · Synced Sep 29, 2026, 6:59 PM EDT
Completed Not applicable Interventional

Graduated Recovery Intervention Program for Enhancing Treatment for First-Episode Psychosis

NCT00307216
View directory record Official record
Conditions
Psychotic Disorders, Schizophrenia
Interventions
Graduated Recovery Intervention Program (GRIP), Treatment as usual (TAU)
Behavioral
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 28, 2013 · Synced Sep 29, 2026, 6:59 PM EDT