{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Placebo+to+match+risperidone", "query": { "intervention": "Placebo to match risperidone" }, "page_size": 10 }, "pagination": { "page": 1, "page_size": 10, "total_count": 18, "total_pages": 2, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Placebo+to+match+risperidone&page=2&page_size=10", "previous_page_url": null }, "source": "remote", "last_synced_at": "2026-09-28T22:10:37.997Z", "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": "NCT03055338", "title": "An Active-Controlled Early Phase Study of Elpipodect (MK-8189) in Adults With Schizophrenia (MK-8189-005)", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Schizophrenia, Acute Episode" ], "interventions": [ { "name": "Elpipodect", "type": "DRUG" }, { "name": "Risperidone", "type": "DRUG" }, { "name": "Placebo matching MK-8189", "type": "DRUG" }, { "name": "Placebo matching risperidone", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Merck Sharp & Dohme LLC", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "50 Years", "sex": "ALL", "summary": "18 Years to 50 Years" }, "enrollment_count": 224, "start_date": "2017-03-08", "completion_date": "2018-01-09", "has_results": true, "last_update_posted_date": "2026-04-29", "last_synced_at": "2026-09-28T22:10:37.997Z", "location_count": 28, "location_summary": "Little Rock, Arkansas • Rogers, Arkansas • Bellflower, California + 23 more", "locations": [ { "city": "Little Rock", "state": "Arkansas" }, { "city": "Rogers", "state": "Arkansas" }, { "city": "Bellflower", "state": "California" }, { "city": "Cerritos", "state": "California" }, { "city": "Garden Grove", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT03055338" }, { "nct_id": "NCT00563706", "title": "Study Evaluating Vabicaserin in Subjects With Schizophrenia", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Schizophrenia" ], "interventions": [ { "name": "vabicaserin", "type": "DRUG" }, { "name": "risperidone", "type": "DRUG" }, { "name": "placebo", "type": "OTHER" } ], "intervention_types": [ "DRUG", "OTHER" ], "sponsor": "Pfizer", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "65 Years", "sex": "MALE", "summary": "18 Years to 65 Years · Male only" }, "enrollment_count": 199, "start_date": "2007-12", "completion_date": "2008-06", "has_results": true, "last_update_posted_date": "2014-03-20", "last_synced_at": "2026-09-28T22:10:37.997Z", "location_count": 32, "location_summary": "Little Rock, Arkansas • Cerritos, California • Escondido, California + 27 more", "locations": [ { "city": "Little Rock", "state": "Arkansas" }, { "city": "Cerritos", "state": "California" }, { "city": "Escondido", "state": "California" }, { "city": "Garden Grove", "state": "California" }, { "city": "Glendale", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT00563706" }, { "nct_id": "NCT01052103", "title": "A Study of LY2140023 in Schizophrenia Patients With Prominent Negative Symptoms", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Schizophrenia" ], "interventions": [ { "name": "LY2140023", "type": "DRUG" }, { "name": "Placebo", "type": "DRUG" }, { "name": "Standard of Care", "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": 167, "start_date": "2010-01", "completion_date": "2012-06", "has_results": true, "last_update_posted_date": "2022-09-07", "last_synced_at": "2026-09-28T22:10:37.997Z", "location_count": 4, "location_summary": "Garden Grove, California • Chicago, Illinois • Hoffman Estates, Illinois + 1 more", "locations": [ { "city": "Garden Grove", "state": "California" }, { "city": "Chicago", "state": "Illinois" }, { "city": "Hoffman Estates", "state": "Illinois" }, { "city": "New York", "state": "New York" } ], "official_url": "https://clinicaltrials.gov/study/NCT01052103" }, { "nct_id": "NCT02469155", "title": "A Trial to Assess the Antipsychotic Efficacy of ITI-007 Over 6 Weeks of Treatment", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Schizophrenia" ], "interventions": [ { "name": "ITI-007", "type": "DRUG" }, { "name": "Risperidone", "type": "DRUG" }, { "name": "Placebo", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Intra-Cellular Therapies, Inc.", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "60 Years", "sex": "ALL", "summary": "18 Years to 60 Years" }, "enrollment_count": 696, "start_date": "2015-06", "completion_date": "2016-08", "has_results": true, "last_update_posted_date": "2025-10-02", "last_synced_at": "2026-09-28T22:10:37.997Z", "location_count": 11, "location_summary": "Little Rock, Arkansas • Springdale, Arkansas • Culver City, California + 8 more", "locations": [ { "city": "Little Rock", "state": "Arkansas" }, { "city": "Springdale", "state": "Arkansas" }, { "city": "Culver City", "state": "California" }, { "city": "Lemon Grove", "state": "California" }, { "city": "Long Beach", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT02469155" }, { "nct_id": "NCT04624243", "title": "Efficacy and Safety of Elpipodect (MK-8189) in Participants With an Acute Episode of Schizophrenia (MK-8189-008)", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Schizophrenia" ], "interventions": [ { "name": "Elpipodect", "type": "DRUG" }, { "name": "Risperidone", "type": "DRUG" }, { "name": "Placebo to MK-8189", "type": "DRUG" }, { "name": "Placebo to risperidone", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Merck Sharp & Dohme LLC", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "55 Years", "sex": "ALL", "summary": "18 Years to 55 Years" }, "enrollment_count": 499, "start_date": "2020-12-15", "completion_date": "2024-06-21", "has_results": true, "last_update_posted_date": "2026-04-29", "last_synced_at": "2026-09-28T22:10:37.997Z", "location_count": 35, "location_summary": "Bentonville, Arkansas • Little Rock, Arkansas • Rogers, Arkansas + 27 more", "locations": [ { "city": "Bentonville", "state": "Arkansas" }, { "city": "Little Rock", "state": "Arkansas" }, { "city": "Rogers", "state": "Arkansas" }, { "city": "Bellflower", "state": "California" }, { "city": "Culver City", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT04624243" }, { "nct_id": "NCT03565068", "title": "A Safety, Tolerability, and Pharmacokinetics Study of MK-8189 in Participants With Schizophrenia and in Healthy Participants (MK-8189-007)", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Schizophrenia" ], "interventions": [ { "name": "MK-8189", "type": "DRUG" }, { "name": "Placebo", "type": "DRUG" }, { "name": "Background AAP Therapy", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Merck Sharp & Dohme LLC", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "60 Years", "sex": "ALL", "summary": "18 Years to 60 Years" }, "enrollment_count": 75, "start_date": "2018-06-20", "completion_date": "2020-04-03", "has_results": true, "last_update_posted_date": "2021-03-29", "last_synced_at": "2026-09-28T22:10:37.997Z", "location_count": 1, "location_summary": "Glendale, California", "locations": [ { "city": "Glendale", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT03565068" }, { "nct_id": "NCT04567524", "title": "A Multiple Dose Study to Assess the Safety, Tolerability and PK of Risperidone Extended Release Capsules", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Schizophrenia Schizoaffective" ], "interventions": [ { "name": "LYN-005", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Lyndra Inc.", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "50 Years", "sex": "ALL", "summary": "18 Years to 50 Years" }, "enrollment_count": 34, "start_date": "2020-08-13", "completion_date": "2020-12-22", "has_results": true, "last_update_posted_date": "2023-02-08", "last_synced_at": "2026-09-28T22:10:37.997Z", "location_count": 5, "location_summary": "Long Beach, California • Atlanta, Georgia • Marlton, New Jersey + 2 more", "locations": [ { "city": "Long Beach", "state": "California" }, { "city": "Atlanta", "state": "Georgia" }, { "city": "Marlton", "state": "New Jersey" }, { "city": "Austin", "state": "Texas" }, { "city": "Richardson", "state": "Texas" } ], "official_url": "https://clinicaltrials.gov/study/NCT04567524" }, { "nct_id": "NCT03893825", "title": "A Study to Test if TV-46000 is Safe for Maintenance Treatment of Schizophrenia", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Schizophrenia" ], "interventions": [ { "name": "TV-46000", "type": "DRUG" }, { "name": "Placebo", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Teva Branded Pharmaceutical Products R&D, Inc.", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "13 Years", "maximum_age": "65 Years", "sex": "ALL", "summary": "13 Years to 65 Years" }, "enrollment_count": 336, "start_date": "2019-04-17", "completion_date": "2021-12-02", "has_results": true, "last_update_posted_date": "2022-12-07", "last_synced_at": "2026-09-28T22:10:37.997Z", "location_count": 67, "location_summary": "Phoenix, Arizona • Scottsdale, Arizona • Tucson, Arizona + 57 more", "locations": [ { "city": "Phoenix", "state": "Arizona" }, { "city": "Scottsdale", "state": "Arizona" }, { "city": "Tucson", "state": "Arizona" }, { "city": "Rogers", "state": "Arkansas" }, { "city": "Anaheim", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT03893825" }, { "nct_id": "NCT00132678", "title": "A Study of the Safety and Efficacy of Injectable Risperidone in the Prevention of Bipolar Mood Episodes", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE3" ], "conditions": [ "Bipolar Disorder" ], "interventions": [ { "name": "Risperdal Consta", "type": "DRUG" }, { "name": "Placebo", "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": 559, "start_date": "2005-02", "completion_date": "2007-12", "has_results": true, "last_update_posted_date": "2013-07-29", "last_synced_at": "2026-09-28T22:10:37.997Z", "location_count": 14, "location_summary": "Little Rock, Arkansas • La Mesa, California • National City, California + 11 more", "locations": [ { "city": "Little Rock", "state": "Arkansas" }, { "city": "La Mesa", "state": "California" }, { "city": "National City", "state": "California" }, { "city": "Washington D.C.", "state": "District of Columbia" }, { "city": "Bradenton", "state": "Florida" } ], "official_url": "https://clinicaltrials.gov/study/NCT00132678" }, { "nct_id": "NCT03557931", "title": "A Study to Assess the Safety and Efficacy of ASP4345 as Add-on Treatment for Cognitive Impairment in Subjects With Schizophrenia on Stable Doses of Antipsychotic Medication", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE2" ], "conditions": [ "Schizophrenia" ], "interventions": [ { "name": "ASP4345", "type": "DRUG" }, { "name": "placebo", "type": "DRUG" }, { "name": "risperidone", "type": "DRUG" }, { "name": "quetiapine", "type": "DRUG" }, { "name": "olanzapine", "type": "DRUG" }, { "name": "ziprasidone", "type": "DRUG" }, { "name": "aripiprazole", "type": "DRUG" }, { "name": "brexpiprazole", "type": "DRUG" }, { "name": "paliperidone", "type": "DRUG" }, { "name": "lurasidone", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Astellas Pharma Global Development, Inc.", "sponsor_class": "INDUSTRY", "healthy_volunteers": false, "eligibility": { "minimum_age": "18 Years", "maximum_age": "55 Years", "sex": "ALL", "summary": "18 Years to 55 Years" }, "enrollment_count": 233, "start_date": "2018-07-13", "completion_date": "2019-10-21", "has_results": true, "last_update_posted_date": "2024-11-12", "last_synced_at": "2026-09-28T22:10:37.997Z", "location_count": 27, "location_summary": "Cerritos, California • Garden Grove, California • Lemon Grove, California + 19 more", "locations": [ { "city": "Cerritos", "state": "California" }, { "city": "Garden Grove", "state": "California" }, { "city": "Lemon Grove", "state": "California" }, { "city": "Oakland", "state": "California" }, { "city": "Pico Rivera", "state": "California" } ], "official_url": "https://clinicaltrials.gov/study/NCT03557931" } ] }