{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=risperidone%2C+quetiapine", "query": { "intervention": "risperidone, quetiapine" }, "page_size": 10 }, "pagination": { "page": 1, "page_size": 10, "total_count": 52, "total_pages": 6, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=risperidone%2C+quetiapine&page=2&page_size=10", "previous_page_url": null }, "source": "remote", "last_synced_at": "2026-10-02T03:13:57.708Z", "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.", "notes": [ "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.", "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.", "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees." ], "trials": [ { "nct_id": "NCT01129674", "title": "A Long-Term, Open-Label, Study on Schizophrenia", "overall_status": "TERMINATED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2", "PHASE3" ], "conditions": [ "Schizophrenia" ], "interventions": [ { "name": "LY2140023", "type": "DRUG" }, { "name": "Olanzapine", "type": "DRUG" }, { "name": "Aripiprazole", "type": "DRUG" }, { "name": "Risperidone", "type": "DRUG" }, { "name": "Quetiapine", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Denovo Biopharma LLC", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "65 Years", "sex": "ALL", "summary": "18 Years to 65 Years" }, "enrollment_count": 560, "start_date": "2010-06", "completion_date": "2012-10", "has_results": false, "last_update_posted_date": "2026-09-14", "last_synced_at": "2026-10-02T03:13:57.708Z", "location_count": 42, "location_summary": "Little Rock, Arkansas • Escondido, California • Garden Grove, California + 39 more", "locations": [ { "city": "Little Rock", "state": "Arkansas" }, { "city": "Escondido", "state": "California" }, { "city": "Garden Grove", "state": "California" }, { "city": "Long Beach", "state": "California" }, { "city": "National City", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT01129674" }, { "nct_id": "NCT00255879", "title": "Movement Disorders Caused by Antipsychotic Drugs in Older Patients", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Dyskinesia, Drug-Induced" ], "interventions": [ { "name": "Quetiapine", "type": "DRUG" }, { "name": "Risperidone", "type": "DRUG" }, { "name": "Olanzapine", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "University of California, San Diego", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "40 Years", "maximum_age": null, "sex": "ALL", "summary": "40 Years and older" }, "enrollment_count": 250, "start_date": "1999-01", "completion_date": "2004-08", "has_results": false, "last_update_posted_date": "2013-06-06", "last_synced_at": "2026-10-02T03:13:57.708Z", "location_count": 1, "location_summary": "San Diego, California", "locations": [ { "city": "San Diego", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT00255879" }, { "nct_id": "NCT05402111", "title": "A Clinical Study That Will Assess How Food Moves Through the Stomach and Effects Blood Glucose Levels in Subjects With Schizophrenia Taking SEP-363856 or and Prior Antipsychotic (PA) Standard", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Schizophrenia" ], "interventions": [ { "name": "SEP-363856", "type": "DRUG" }, { "name": "Prior antipsychotic (risperidone, olanzapine, quetiapine or aripiprazole)", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Otsuka Pharmaceutical Development & Commercialization, Inc.", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "65 Years", "sex": "ALL", "summary": "18 Years to 65 Years" }, "enrollment_count": 31, "start_date": "2022-06-13", "completion_date": "2023-09-27", "has_results": false, "last_update_posted_date": "2024-06-26", "last_synced_at": "2026-10-02T03:13:57.708Z", "location_count": 7, "location_summary": "Little Rock, Arkansas • Rogers, Arkansas • Long Beach, California + 4 more", "locations": [ { "city": "Little Rock", "state": "Arkansas" }, { "city": "Rogers", "state": "Arkansas" }, { "city": "Long Beach", "state": "California" }, { "city": "San Diego", "state": "California" }, { "city": "Hialeah", "state": "Florida" } ], "official_url": "https://clinicaltrials.gov/study/NCT05402111" }, { "nct_id": "NCT00347425", "title": "Switch Study of Existing Atypical Antipsychotics to Bifeprunox", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Schizophrenia and Schizoaffective Disorder" ], "interventions": [ { "name": "Aripiprazole", "type": "DRUG" }, { "name": "Olanzapine", "type": "DRUG" }, { "name": "Risperidone", "type": "DRUG" }, { "name": "Quetiapine", "type": "DRUG" }, { "name": "Ziprasidone", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Solvay Pharmaceuticals", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "65 Years", "sex": "ALL", "summary": "18 Years to 65 Years" }, "enrollment_count": 286, "start_date": "2006-12", "completion_date": "2008-02", "has_results": false, "last_update_posted_date": "2008-05-21", "last_synced_at": "2026-10-02T03:13:57.708Z", "location_count": 63, "location_summary": "Birmingham, Alabama • Little Rock, Arkansas • Anaheim, California + 54 more", "locations": [ { "city": "Birmingham", "state": "Alabama" }, { "city": "Little Rock", "state": "Arkansas" }, { "city": "Anaheim", "state": "California" }, { "city": "Cerritos", "state": "California" }, { "city": "Cerritos", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT00347425" }, { "nct_id": "NCT00330863", "title": "Preventing Relapse in Schizophrenia: Oral Antipsychotics Compared To Injectables: Evaluating Efficacy", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE4" ], "conditions": [ "Schizophrenia", "Schizoaffective Disorder" ], "interventions": [ { "name": "Risperidone microspheres", "type": "DRUG" }, { "name": "Risperidone", "type": "DRUG" }, { "name": "Olanzapine", "type": "DRUG" }, { "name": "Quetiapine", "type": "DRUG" }, { "name": "Ziprasidone", "type": "DRUG" }, { "name": "Aripiprazole", "type": "DRUG" }, { "name": "Paliperidone", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Northwell Health", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "65 Years", "sex": "ALL", "summary": "18 Years to 65 Years" }, "enrollment_count": 357, "start_date": "2006-05", "completion_date": "2011-01", "has_results": true, "last_update_posted_date": "2018-07-10", "last_synced_at": "2026-10-02T03:13:57.708Z", "location_count": 8, "location_summary": "Los Angeles, California • Augusta, Georgia • Iowa City, Iowa + 5 more", "locations": [ { "city": "Los Angeles", "state": "California" }, { "city": "Augusta", "state": "Georgia" }, { "city": "Iowa City", "state": "Iowa" }, { "city": "Boston", "state": "Massachusetts" }, { "city": "Fall River", "state": "Massachusetts" } ], "official_url": "https://clinicaltrials.gov/study/NCT00330863" }, { "nct_id": "NCT01272752", "title": "Anti-psychotic Medication (New Use) Weight Loss Study", "overall_status": "WITHDRAWN", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Obesity" ], "interventions": [ { "name": "IHBG-10", "type": "DIETARY_SUPPLEMENT" }, { "name": "Placebo", "type": "DIETARY_SUPPLEMENT" } ], "intervention_types": [ "DIETARY_SUPPLEMENT" ], "sponsor": "Avera McKennan Hospital & University Health Center", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 0, "start_date": "2013-04", "completion_date": "2013-12", "has_results": false, "last_update_posted_date": "2012-06-01", "last_synced_at": "2026-10-02T03:13:57.708Z", "location_count": 1, "location_summary": "Sioux Falls, South Dakota", "locations": [ { "city": "Sioux Falls", "state": "South Dakota" } ], "official_url": "https://clinicaltrials.gov/study/NCT01272752" }, { "nct_id": "NCT00061802", "title": "Efficacy and Safety of Two Atypical Antipsychotics vs. Placebo in Patients With an Acute Exacerbation of Either Schizophrenia or Schizoaffective Disorder", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE4" ], "conditions": [ "Schizophrenia", "Schizoaffective Disorder" ], "interventions": [ { "name": "risperidone, quetiapine", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Johnson & Johnson Pharmaceutical Research & Development, L.L.C.", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "65 Years", "sex": "ALL", "summary": "18 Years to 65 Years" }, "enrollment_count": 225, "start_date": "2003-06", "completion_date": "2004-02", "has_results": false, "last_update_posted_date": "2012-02-07", "last_synced_at": "2026-10-02T03:13:57.708Z", "location_count": 7, "location_summary": "San Diego, California • Hoffman Est, Illinois • Lake Charles, Louisiana + 4 more", "locations": [ { "city": "San Diego", "state": "California" }, { "city": "Hoffman Est", "state": "Illinois" }, { "city": "Lake Charles", "state": "Louisiana" }, { "city": "Jackson", "state": "Mississippi" }, { "city": "Visakhapatnam", "state": "Missouri" } ], "official_url": "https://clinicaltrials.gov/study/NCT00061802" }, { "nct_id": "NCT04002700", "title": "A Study to Assess Stroke Risk Among Users of Typical Versus Atypical Antipsychotics Stratified by Broad Age Group", "overall_status": "COMPLETED", "study_type": "OBSERVATIONAL", "phases": [], "conditions": [ "Stroke" ], "interventions": [ { "name": "Haloperidol", "type": "DRUG" }, { "name": "Typical Antipsychotics", "type": "DRUG" }, { "name": "Atypical Antipsychotics", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Janssen Research & Development, LLC", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 1234412, "start_date": "2019-05-06", "completion_date": "2019-05-31", "has_results": false, "last_update_posted_date": "2025-06-25", "last_synced_at": "2026-10-02T03:13:57.708Z", "location_count": 1, "location_summary": "Titusville, New Jersey", "locations": [ { "city": "Titusville", "state": "New Jersey" } ], "official_url": "https://clinicaltrials.gov/study/NCT04002700" }, { "nct_id": "NCT01844700", "title": "1/2-MC4R Genotype and Pediatric Antipsychotic Drug- Induced Weight Gain", "overall_status": "TERMINATED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE4" ], "conditions": [ "High Risk MC4R Genotype", "Low Risk MC4R Genotype", "One Week or Less Antipsychotic Lifetime Exposure" ], "interventions": [ { "name": "Ziprasidone", "type": "DRUG" }, { "name": "aripiprazole, quetiapine, or risperidone", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Northwell Health", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "13 Years", "maximum_age": "18 Years", "sex": "ALL", "summary": "13 Years to 18 Years" }, "enrollment_count": 14, "start_date": "2013-07", "completion_date": "2014-04", "has_results": true, "last_update_posted_date": "2016-02-05", "last_synced_at": "2026-10-02T03:13:57.708Z", "location_count": 1, "location_summary": "Glen Oaks, New York", "locations": [ { "city": "Glen Oaks", "state": "New York" } ], "official_url": "https://clinicaltrials.gov/study/NCT01844700" }, { "nct_id": "NCT07570875", "title": "Evaluating the Impact of Ketogenic Therapy on Symptom Severity and Metabolic Side Effect Profile Among Individuals Living With Bipolar Disorder in A Rural Southern Catchment Area", "overall_status": "NOT_YET_RECRUITING", "study_type": "INTERVENTIONAL", "phases": [ "NA" ], "conditions": [ "Bipolar Disorder" ], "interventions": [ { "name": "Ketogenic foodstuffs", "type": "DIETARY_SUPPLEMENT" }, { "name": "Standard of Care Oral antipsychotics", "type": "OTHER" }, { "name": "Standard of care long acting injectable medication for bipolar disorder", "type": "OTHER" } ], "intervention_types": [ "DIETARY_SUPPLEMENT", "OTHER" ], "sponsor": "University of Alabama at Birmingham", "sponsor_class": "OTHER", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": null, "sex": "ALL", "summary": "18 Years and older" }, "enrollment_count": 100, "start_date": "2026-10", "completion_date": "2027-10", "has_results": false, "last_update_posted_date": "2026-09-21", "last_synced_at": "2026-10-02T03:13:57.708Z", "location_count": 1, "location_summary": "Montgomery, Alabama", "locations": [ { "city": "Montgomery", "state": "Alabama" } ], "official_url": "https://clinicaltrials.gov/study/NCT07570875" } ] }