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Showing 1–24 of 380 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Antipsychotics Clear all
Completed Phase 4 Interventional Results available

Comparison of Clozapine vs Olanzapine in Childhood-Onset Psychotic Disorders

NCT00001656
View directory record Official record
Conditions
Childhood Schizophrenia, Psychotic Disorder, Schizophrenia
Interventions
Olanzapine, Clozapine
Drug
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
7 Years to 18 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1997 – 2008
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 11, 2011 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Phase 1 Interventional

A Clinical Study That Will Assess the Effect of SEP-363856 and Prior Antipsychotic (PA) Standard of Care on Glucose and Regulation of Insulin in Patients With Schizophrenia

NCT05463770
View directory record Official record
Conditions
Schizophrenia
Interventions
SEP-363856
Drug
Lead sponsor
Otsuka Pharmaceutical Development & Commercialization, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
8
States / cities
Little Rock, Arkansas • Rogers, Arkansas • Long Beach, California + 5 more
Source: ClinicalTrials.gov public record
Updated Jun 25, 2024 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Not applicable Interventional

A Study of Strategies to Improve Schizophrenia Treatment

NCT00156637
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder
Interventions
Team-Based Quality Improvement Intervention, Opinion Leader Intervention, Team Based Quality Improvement
Behavioral
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years to 65 Years
Enrollment
106 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
4
States / cities
Fayetteville, Arkansas • No. Little Rock, Arkansas • Dayton, Ohio + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 6, 2015 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Not applicable Interventional

Antidepressant and Antipsychotic to Treat Attenuated Positive and Negative Symptoms

NCT00169988
View directory record Official record
Conditions
Prodromal Schizophrenia, Psychotic Disorders
Interventions
risperidone, sertraline-primary
Drug
Lead sponsor
Northwell Health
Other
Eligibility
12 Years to 22 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
1
States / cities
Glen Oaks, New York
Source: ClinicalTrials.gov public record
Updated Dec 16, 2009 · Synced Sep 8, 2026, 5:49 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 8, 2026, 5:49 PM EDT
Enrolling by invitation Not applicable Interventional

Incentives and Long-Acting Injectable Adherence After Involuntary Hospitalization

NCT07130500
View directory record Official record
Conditions
Schizophrenia Disorder, Schizoaffective Disorder, Bipolar Disorder (BD), Substance Use Disorder (SUD)
Interventions
Financial incentives for adherence to long-acting injectable medication, Standard of care with monthly surveys
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 65 Years
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
5
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 26, 2026 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Phase 3 Interventional Results available

Open-label Study of Flexible-dose Paliperidone ER (Extended Release) to Treat Adolescent Schizophrenia.

NCT00488319
View directory record Official record
Conditions
Schizophrenia, Schizophrenic Disorders, Psychotic Disorders, Dementia Praecox
Interventions
Paliperidone ER
Drug
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
12 Years to 17 Years
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
14
States / cities
Cerritos, California • San Diego, California • Santa Ana, California + 11 more
Source: ClinicalTrials.gov public record
Updated Feb 9, 2017 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Phase 4 Interventional

The Effects of Aripiprazole on Patients With Metabolic Syndrome

NCT00224822
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder, Bipolar Disorder, Metabolic Syndrome X
Interventions
Aripiprazole
Drug
Lead sponsor
New Mexico VA Healthcare System
Federal
Eligibility
18 Years to 65 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Mar 23, 2010 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Phase 4 Interventional Results available

The Use of Metformin in the Treatment of Antipsychotic-Induced Weight Gain in Schizophrenia (The METS Study)

NCT00816907
View directory record Official record
Conditions
Schizophrenia
Interventions
Metformin, Placebo
Drug
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
18 Years to 65 Years
Enrollment
146 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
16
States / cities
Palo Alto, California • Boca Raton, Florida • Iowa City, Iowa + 13 more
Source: ClinicalTrials.gov public record
Updated Mar 26, 2013 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Molecular Mechanisms of Antipsychotic-induced Insulin Resistance

NCT02708394
View directory record Official record
Conditions
Adverse Effect of Other Antipsychotics and Neuroleptics, Insulin Resistance
Interventions
olanzapine, placebo
Drug
Lead sponsor
Wayne State University
Other
Eligibility
21 Years to 45 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2023
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Oct 30, 2023 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Phase 3 Interventional Results available

Comparison of Paliperidone Palmitate and RISPERDAL CONSTA in Patients With Schizophrenia

NCT00589914
View directory record Official record
Conditions
Schizophrenia
Interventions
RISPERDAL CONSTA, Paliperidone palmitate
Drug
Lead sponsor
Johnson & Johnson Pharmaceutical Research & Development, L.L.C.
Industry
Eligibility
18 Years and older
Enrollment
1,221 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
15
States / cities
Birmingham, Alabama • Little Rock, Arkansas • Cerritos, California + 12 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2014 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Phase 3 Interventional Results available

Open-label Study to Compare Hospitalization Rates of Schizophrenic Patients Treated With Oral Antipsychotics Versus IM Depot Aripiprazole

NCT01432444
View directory record Official record
Conditions
Schizophrenia
Interventions
Aripiprazole (Abilify®) IM Depot Injection
Drug
Lead sponsor
Otsuka Pharmaceutical Development & Commercialization, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
493 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
119
States / cities
Dothan, Alabama • Tucson, Arizona • Fayetteville, Arkansas + 97 more
Source: ClinicalTrials.gov public record
Updated May 6, 2015 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Phase 3 Interventional

A Study to Evaluate Efficacy and Safety of Bitopertin in Participants With Persistent, Predominant Negative Symptoms of Schizophrenia

NCT01192880
View directory record Official record
Conditions
Schizophrenia
Interventions
Placebo, Bitopertin, Antipsychotics
Drug
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
18 Years and older
Enrollment
625 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
27
States / cities
Costa Mesa, California • Escondido, California • Granada Hills, California + 24 more
Source: ClinicalTrials.gov public record
Updated Feb 14, 2017 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Phase 2 Interventional Results available

Efficacy and Tolerability Study of Betahistine to Ameliorate Antipsychotic Associated Weight Gain

NCT00709202
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder, Schizophreniform Disorder, Bipolar I Disorder, Bipolar II, Bipolar NOS(Not Otherwise Specified), Psychotic Disorder Not Otherwise Specified, Autism Spectrum Disorder
Interventions
Betahistine, Placebo Oral Tablet
Drug
Lead sponsor
Nathan Kline Institute for Psychiatric Research
Other
Eligibility
18 Years to 59 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2016
U.S. locations
1
States / cities
Orangeburg, New York
Source: ClinicalTrials.gov public record
Updated Jan 24, 2019 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Phase 4 Interventional Results available

Does The Addition Of Divalproex Sodium ER To An Atypical Antipsychotic Drug (APD) Improve Cognition And Psychopathology In Outpatients With Schizophrenia (SCH) Or Schizoaffective Disorder (SAD)?

NCT00306475
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder
Interventions
Divalproex Sodium Extended-Release Tablets, placebo
Drug
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 26, 2025 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Phase 3 Interventional

Journey Study: Evaluate the Efficacy, Safety, and Tolerability of Valbenazine as Adjunctive Treatment for Schizophrenia

NCT05110157
View directory record Official record
Conditions
Schizophrenia
Interventions
Placebo, Valbenazine
Drug
Lead sponsor
Neurocrine Biosciences
Industry
Eligibility
18 Years and older
Enrollment
442 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
50
States / cities
Phoenix, Arizona • Rogers, Arkansas • Anaheim, California + 39 more
Source: ClinicalTrials.gov public record
Updated Feb 9, 2026 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Phase 2 Interventional

The MIND Study: Modifying the INcidence of Delirium

NCT00096863
View directory record Official record
Conditions
Delirium, Cognition Disorders
Interventions
Ziprasidone, Haloperidol, Placebo
Drug · Other
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years and older
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
5
States / cities
Iowa City, Iowa • Chapel Hill, North Carolina • Greensboro, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 28, 2016 · Synced Sep 8, 2026, 5:49 PM EDT
Completed No phase listed Observational

Relative Effectiveness of Schizophrenia Therapy Study

NCT01245348
View directory record Official record
Conditions
Schizophrenia, Bipolar Disorder
Interventions
SULT4A1-1 genetic test
Genetic
Lead sponsor
Medco Health Solutions, Inc.
Industry
Eligibility
18 Years and older
Enrollment
1,110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Franklin Lakes, New Jersey
Source: ClinicalTrials.gov public record
Updated Feb 24, 2013 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Phase 1 Interventional Results available

Safety, Tolerability, and Pharmacokinetic Study of EVP-6124 in Patients With Schizophrenia

NCT01556763
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder, Central Nervous System Diseases
Interventions
EVP-6124 (0.3 mg/day), EVP-6124 (1.0 mg/day), Placebo, Antipsychotic therapy
Drug
Lead sponsor
FORUM Pharmaceuticals Inc
Industry
Eligibility
18 Years to 55 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008
U.S. locations
1
States / cities
Wichita, Kansas
Source: ClinicalTrials.gov public record
Updated Jun 20, 2012 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Phase 3 Interventional

New Antipsychotic Strategies: Quetiapine and Risperidone vs. Fluphenazine in Treatment Resistant Schizophrenia

NCT00161018
View directory record Official record
Conditions
Schizophrenia
Interventions
Quetiapine, Risperidone, Fluphenazine
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 65 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2004
U.S. locations
1
States / cities
Catonsville, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 18, 2019 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Phase 3 Interventional

Study of Licarbazepine in the Treatment of Manic Episodes of Bipolar Disorder

NCT00107939
View directory record Official record
Conditions
Bipolar Disorder
Interventions
Licarbazepine
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years to 70 Years
Enrollment
453 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
22
States / cities
Little Rock, Arkansas • Orange, California • Pico Rivera, California + 18 more
Source: ClinicalTrials.gov public record
Updated Mar 21, 2017 · Synced Sep 8, 2026, 5:49 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Akathisia (Restless Legs Syndrome) in People With Schizophrenia and Mental Retardation

NCT00065286
View directory record Official record
Conditions
Akathisia
Interventions
Not listed
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
18 Years to 60 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
1996 – 1999
U.S. locations
2
States / cities
Morganton, North Carolina • University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 8, 2026, 5:49 PM EDT
Completed No phase listed Observational

Adherence in Patients Admitted to a Psychiatric Unit for Acute Psychosis: an Analysis of Serum Levels of Antipsychotics.

NCT01786369
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder, Bipolar Disorder
Interventions
Not listed
Lead sponsor
Northwell Health
Other
Eligibility
18 Years and older
Enrollment
106 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Glen Oaks, New York
Source: ClinicalTrials.gov public record
Updated Apr 13, 2015 · Synced Sep 8, 2026, 5:49 PM EDT
Completed Phase 4 Interventional Results available

Salsalate as an Adjunctive Treatment for Patients With Schizophrenia

NCT01578486
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder
Interventions
salsalate
Drug
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years to 65 Years
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 7, 2018 · Synced Sep 8, 2026, 5:49 PM EDT