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Showing 1–24 of 33 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Treatment-Refractory Schizophrenia Clear all
Terminated Not applicable Interventional Results available

Transcranial Magnetic Stimulation for the Treatment of Auditory Hallucinations in Schizophrenia

NCT01595503
View directory record Official record
Conditions
Schizophrenia
Interventions
rTMS with fMRI-based targeting, rTMS with landmark-based targeting
Procedure
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 60 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 7, 2021 · Synced Jul 22, 2026, 8:17 PM EDT
Completed Phase 4 Interventional Results available

High Dose Lurasidone for Patients With Treatment Resistant Schizophrenia

NCT01569659
View directory record Official record
Conditions
Schizophrenia
Interventions
Lurasidone
Drug
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 60 Years
Enrollment
101 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
2
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 27, 2025 · Synced Jul 22, 2026, 8:17 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 Jul 22, 2026, 8:17 PM EDT
Completed Not applicable Interventional

Treatment of Refractory Schizophrenia With Riluzole

NCT00375050
View directory record Official record
Conditions
Schizophrenia, Schizoaffective
Interventions
Riluzole, Placebo
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 65 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2006
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Dec 8, 2019 · Synced Jul 22, 2026, 8:17 PM EDT
Terminated Phase 1 Interventional

Transcranial Direct Current Brain Stimulation to Treat Patients With Childhood-Onset Schizophrenia

NCT00757497
View directory record Official record
Conditions
Childhood Onset Psychotic Disorders, Schizophrenia, Psychosis, Mental Disorders
Interventions
Electrical Polarization
Behavioral
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
10 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2015
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 11, 2019 · Synced Jul 22, 2026, 8:17 PM EDT
Withdrawn Phase 2 Interventional

L-arginine Study for Persistent Symptoms of Schizophrenia

NCT04054973
View directory record Official record
Conditions
Schizo Affective Disorder, Schizophrenia
Interventions
L-arginine, Sapropterin Dihydrochloride
Drug
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 19, 2022 · Synced Jul 22, 2026, 8:17 PM EDT
Terminated Phase 2 Interventional Results available

Telmisartan Pilot Study on Treatment Resistant Schizophrenia

NCT03868839
View directory record Official record
Conditions
Schizophrenia, Schizo Affective Disorder, Treatment-resistant Schizophrenia
Interventions
Telmisartan Pill
Drug
Lead sponsor
Xiaoduo Fan
Other
Eligibility
18 Years to 65 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 1, 2022 · Synced Jul 22, 2026, 8:17 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 Jul 22, 2026, 8:17 PM EDT
Completed Phase 4 Interventional

Effectiveness of Clozapine Versus Olanzapine for Treatment-resistant Schizophrenia

NCT00169065
View directory record Official record
Conditions
Schizophrenia
Interventions
Clozapine, Olanzapine
Drug
Lead sponsor
Harvard Medical School (HMS and HSDM)
Other
Eligibility
20 Years to 60 Years
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2002
U.S. locations
1
States / cities
Jamaica Plain, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 6, 2015 · Synced Jul 22, 2026, 8:17 PM EDT
Recruiting Not applicable Interventional

Real-time fMRI Neurofeedback in Patients With Schizophrenia and Auditory Hallucinations

NCT05299749
View directory record Official record
Conditions
Schizophrenia, Auditory Hallucination, Treatment-resistant Schizophrenia
Interventions
stg-rt-fMRI-Neurofeeback, sham-rt-fMRI-Neurofeedback
Other
Lead sponsor
Boston VA Research Institute, Inc.
Other
Eligibility
18 Years to 55 Years
Enrollment
104 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Brockton, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 17, 2025 · Synced Jul 22, 2026, 8:17 PM EDT
Suspended Not applicable Interventional

Low-Intensity Focused Ultrasound Neuromodulation of the Mediodorsal Thalamus for Treatment-Resistant Schizophrenia

NCT05259306
View directory record Official record
Conditions
Treatment-resistant Schizophrenia
Interventions
Insightec Exablate Neuro MR-guided focused ultrasound transducer
Device
Lead sponsor
NYU Langone Health
Other
Eligibility
21 Years to 80 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2027 – 2029
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 1, 2026 · Synced Jul 22, 2026, 8:17 PM EDT
Completed No phase listed Observational

Neural Biomarkers of Clozapine Response

NCT03076346
View directory record Official record
Conditions
Schizophrenia, Treatment-resistant Schizophrenia, Schizoaffective Disorder
Interventions
Not listed
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 50 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 5, 2025 · Synced Jul 22, 2026, 8:17 PM EDT
Completed Not applicable Interventional Results available

Transcranial Current Stimulation as a Treatment for Auditory Hallucinations in Schizophrenia

NCT01963676
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder, Auditory Hallucinations
Interventions
tDCS, Sham stimulation
Device
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014
U.S. locations
2
States / cities
Chapel Hill, North Carolina • Raleigh, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 21, 2016 · Synced Jul 22, 2026, 8:17 PM EDT
Completed Not applicable Interventional

Transcranial Direct-current Stimulation (tDCS) in Treatment Refractory Auditory Hallucinations

NCT03485131
View directory record Official record
Conditions
Auditory Hallucination, Schizophrenia
Interventions
Transcranial direct-current stimulation (tDCS), Placebo
Device
Lead sponsor
Manhattan Psychiatric Center
Other
Eligibility
18 Years to 65 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 3, 2018 · Synced Jul 22, 2026, 8:17 PM EDT
Recruiting Phase 2Phase 3 Interventional

An Adaptive Phase II/III, Two-Part, Double-Blind, Randomized, Placebo-controlled, Dose-Finding, Multi-center Study of the Safety and Efficacy of NaBen®, as an Add-on Therapy With Clozapine, for Residual Symptoms of Refractory Schizophrenia in Adults

NCT03094429
View directory record Official record
Conditions
Refractory Schizophrenia
Interventions
NaBen®, Placebo
Drug · Other
Lead sponsor
SyneuRx International (Taiwan) Corp
Industry
Eligibility
18 Years to 55 Years
Enrollment
287 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2026
U.S. locations
1
States / cities
Pasadena, California
Source: ClinicalTrials.gov public record
Updated Sep 12, 2021 · Synced Jul 22, 2026, 8:17 PM EDT
Terminated Phase 3 Interventional Results available

Efficacy of Lu AF35700 in Patients With Early-in-disease or Late-in-disease Treatment-resistant Schizophrenia

NCT03230864
View directory record Official record
Conditions
Treatment-resistant Schizophrenia
Interventions
Lu AF35700, Risperidone, Olanzapine
Drug
Lead sponsor
H. Lundbeck A/S
Industry
Eligibility
18 Years and older
Enrollment
119 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
10
States / cities
San Diego, California • Atlanta, Georgia • Chicago, Illinois + 7 more
Source: ClinicalTrials.gov public record
Updated Jan 20, 2020 · Synced Jul 22, 2026, 8:17 PM EDT
Terminated Not applicable Interventional Results available

Treating Refractory Schizophrenia With rTMS

NCT02242578
View directory record Official record
Conditions
Schizophrenia
Interventions
1 Hz rTMS, 10 Hz rTMS
Device
Lead sponsor
Seton Healthcare Family
Other
Eligibility
18 Years to 80 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2018
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Apr 11, 2021 · Synced Jul 22, 2026, 8:17 PM EDT
Not yet recruiting Not applicable Interventional

Deep Brain Stimulation for Treatment-Resistant Schizophrenia

NCT07592611
View directory record Official record
Conditions
Treatment Resistant Disorders
Interventions
Medtronic Percept with SensSight Deep Brain Stimulation System
Device
Lead sponsor
Johns Hopkins University
Other
Eligibility
22 Years to 65 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 14, 2026 · Synced Jul 22, 2026, 8:17 PM EDT
Completed Phase 2Phase 3 Interventional

High Dose of Quetiapine in Treating Subjects With Treatment Refractory Schizophrenia or Schizoaffective Disorder

NCT00297947
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder
Interventions
quetiapine
Drug
Lead sponsor
Manhattan Psychiatric Center
Other
Eligibility
18 Years to 64 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2014
U.S. locations
2
States / cities
New York, New York • Orangeburg, New York
Source: ClinicalTrials.gov public record
Updated Apr 16, 2015 · Synced Jul 22, 2026, 8:17 PM EDT
Completed Phase 3 Interventional Results available

Effect of Lu AF35700 in Patients With Treatment-resistant Schizophrenia

NCT02717195
View directory record Official record
Conditions
Schizophrenia
Interventions
Risperidone, Olanzapine, Lu AF35700
Drug
Lead sponsor
H. Lundbeck A/S
Industry
Eligibility
18 Years and older
Enrollment
1,098 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
49
States / cities
Bellflower, California • Cerritos, California • Costa Mesa, California + 39 more
Source: ClinicalTrials.gov public record
Updated Nov 24, 2019 · Synced Jul 22, 2026, 8:17 PM EDT
Completed No phase listed Observational

Pharmacokinetics of Understudied Drugs Administered to Children Per Standard of Care

NCT01431326
View directory record Official record
Conditions
Adenovirus, Anesthesia, Anxiety, Anxiolysis, Autism, Autistic Disorder, Bacterial Meningitis, Bacterial Septicemia, Benzodiazepine, Bipolar Disorder, Bone and Joint Infections, Central Nervous System Infections, Convulsions, Cytomegalovirus Retinitis, Early-onset Schizophrenia Spectrum Disorders, Epilepsy, General Anesthesia, Gynecologic Infections, Herpes Simplex Virus, Infantile Hemangioma, Infection, Inflammation, Inflammatory Conditions, Intra-abdominal Infections, Lower Respiratory Tract Infections, Migraines, Pain, Pneumonia, Schizophrenia, Sedation, Seizures, Skeletal Muscle Spasms, Skin and Skin-structure Infections, Treatment-resistant Schizophrenia, Urinary Tract Infections, Withdrawal, Sepsis, Gram-negative Infection, Bradycardia, Cardiac Arrest, Cardiac Arrhythmia, Staphylococcal Infections, Nosocomial Pneumonia, Neuromuscular Blockade, Methicillin Resistant Staphylococcus Aureus, Endocarditis, Neutropenia, Headache, Fibrinolytic Bleeding, Pulmonary Arterial Hypertension, CMV Retinitis, Hypertension, Chronic Kidney Diseases, Hyperaldosteronism, Hypokalemia, Heart Failure, Hemophilia, Heavy Menstrual Bleeding, Insomnia
Interventions
The POPS study is collecting PK data on children prescribed the following drugs of interest per standard of care:
Drug
Lead sponsor
Daniel Benjamin
Other
Eligibility
Up to 21 Years
Enrollment
3,520 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2019
U.S. locations
43
States / cities
Anchorage, Alaska • Little Rock, Arkansas • La Jolla, California + 37 more
Source: ClinicalTrials.gov public record
Updated Sep 5, 2023 · Synced Jul 22, 2026, 8:17 PM EDT
Terminated Phase 4 Interventional

Clozapine Versus Chlorpromazine for Treatment-Unresponsive Schizophrenia

NCT00169039
View directory record Official record
Conditions
Schizophrenia
Interventions
Clozapine, Chlorpromazine
Drug
Lead sponsor
Harvard Medical School (HMS and HSDM)
Other
Eligibility
19 Years to 60 Years
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1994 – 2002
U.S. locations
1
States / cities
Jamaica Plain, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 6, 2015 · Synced Jul 22, 2026, 8:17 PM EDT
Terminated Phase 4 Interventional

An Exploratory Analysis of Immune and Inflammatory Response Associated With Clozapine

NCT05741502
View directory record Official record
Conditions
Treatment-resistant Schizophrenia
Interventions
Clozapine, Antipsychotics,Other (non-Clozapine)
Drug
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 65 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 24, 2026 · Synced Jul 22, 2026, 8:17 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Electroconvulsive Therapy in Clozapine Refractory Schizophrenia

NCT00042224
View directory record Official record
Conditions
Schizophrenia
Interventions
Electroconvulsive Therapy (ECT), Clozapine
Procedure · Drug
Lead sponsor
Northwell Health
Other
Eligibility
18 Years to 60 Years
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2008
U.S. locations
1
States / cities
Glen Oaks, New York
Source: ClinicalTrials.gov public record
Updated May 14, 2017 · Synced Jul 22, 2026, 8:17 PM EDT