{ "api_version": "1", "request": { "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Mass+Balance+Study", "query": { "condition": "Mass Balance Study" }, "page_size": 10 }, "pagination": { "page": 1, "page_size": 10, "total_count": 93, "total_pages": 10, "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Mass+Balance+Study&page=2&page_size=10", "previous_page_url": null }, "source": "remote", "last_synced_at": "2026-07-22T00:20:33.249Z", "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": "NCT03158506", "title": "Human Mass Balance Study of HMS5552 in Healthy Subjects", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Healthy Subject" ], "interventions": [ { "name": "HMS5552", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Hua Medicine Limited", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "19 Years", "maximum_age": "55 Years", "sex": "MALE", "summary": "19 Years to 55 Years · Male only" }, "enrollment_count": 6, "start_date": "2017-03-29", "completion_date": "2017-04-06", "has_results": false, "last_update_posted_date": "2018-12-31", "last_synced_at": "2026-07-22T00:20:33.249Z", "location_count": 1, "location_summary": "Lincoln, Nebraska", "locations": [ { "city": "Lincoln", "state": "Nebraska" } ], "official_url": "https://clinicaltrials.gov/study/NCT03158506" }, { "nct_id": "NCT00828763", "title": "GSK1349572 Mass Balance Study", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Healthy Volunteer" ], "interventions": [ { "name": "[14c}-GSK1349572", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "GlaxoSmithKline", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "30 Years", "maximum_age": "55 Years", "sex": "MALE", "summary": "30 Years to 55 Years · Male only" }, "enrollment_count": 6, "start_date": "2009-02", "completion_date": "2009-03", "has_results": false, "last_update_posted_date": "2009-06-05", "last_synced_at": "2026-07-22T00:20:33.249Z", "location_count": 1, "location_summary": "Madison, Wisconsin", "locations": [ { "city": "Madison", "state": "Wisconsin" } ], "official_url": "https://clinicaltrials.gov/study/NCT00828763" }, { "nct_id": "NCT01273103", "title": "A Study to Investigate the Recovery, Excretion, and Pharmacokinetics of 14C-GSK2248761 Administered as an Oral Suspension to Healthy Adult Subjects", "overall_status": "WITHDRAWN", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Infection, Human Immunodeficiency Virus" ], "interventions": [ { "name": "200mg [14C]- GSK2248761", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "ViiV Healthcare", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "30 Years", "maximum_age": "55 Years", "sex": "MALE", "summary": "30 Years to 55 Years · Male only" }, "enrollment_count": 0, "start_date": "2011-01", "completion_date": "2011-02", "has_results": false, "last_update_posted_date": "2014-05-19", "last_synced_at": "2026-07-22T00:20:33.249Z", "location_count": 1, "location_summary": "Madison, Wisconsin", "locations": [ { "city": "Madison", "state": "Wisconsin" } ], "official_url": "https://clinicaltrials.gov/study/NCT01273103" }, { "nct_id": "NCT01367483", "title": "Study of the Pharmacokinetics of Intravenous Administered 14C-MNTX", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Healthy Male Volunteers" ], "interventions": [ { "name": "IV methylnaltrexone (MNTX)", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Bausch Health Americas, Inc.", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "45 Years", "sex": "MALE", "summary": "18 Years to 45 Years · Male only" }, "enrollment_count": 6, "start_date": "2005-06", "completion_date": "2005-06", "has_results": false, "last_update_posted_date": "2019-11-27", "last_synced_at": "2026-07-22T00:20:33.249Z", "location_count": 1, "location_summary": "Tarrytown, New York", "locations": [ { "city": "Tarrytown", "state": "New York" } ], "official_url": "https://clinicaltrials.gov/study/NCT01367483" }, { "nct_id": "NCT02126514", "title": "A Phase I, Open-Label, Single-Center Study to Assess the Absorption, Metabolism, and Excretion of [14C]-AZD3293", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Healthy Volunteers", "Mass Balance Study" ], "interventions": [ { "name": "AZD3293", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "AstraZeneca", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "55 Years", "sex": "MALE", "summary": "18 Years to 55 Years · Male only" }, "enrollment_count": 12, "start_date": "2014-05", "completion_date": "2014-05", "has_results": false, "last_update_posted_date": "2014-06-16", "last_synced_at": "2026-07-22T00:20:33.249Z", "location_count": 1, "location_summary": "Madison, Wisconsin", "locations": [ { "city": "Madison", "state": "Wisconsin" } ], "official_url": "https://clinicaltrials.gov/study/NCT02126514" }, { "nct_id": "NCT01299285", "title": "Disposition of 14C-LY3009104 Following Oral Administration in Healthy Human Subjects", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Healthy Volunteers" ], "interventions": [ { "name": "LY3009104", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Eli Lilly and Company", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "55 Years", "sex": "MALE", "summary": "18 Years to 55 Years · Male only" }, "enrollment_count": 6, "start_date": "2011-02", "completion_date": "2011-03", "has_results": true, "last_update_posted_date": "2017-06-08", "last_synced_at": "2026-07-22T00:20:33.249Z", "location_count": 1, "location_summary": "Madison, Wisconsin", "locations": [ { "city": "Madison", "state": "Wisconsin" } ], "official_url": "https://clinicaltrials.gov/study/NCT01299285" }, { "nct_id": "NCT01924143", "title": "TD-9855 Mass Balance Study", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "ADHD", "Fibromyalgia" ], "interventions": [ { "name": "TD-9855", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Theravance Biopharma", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "50 Years", "sex": "ALL", "summary": "18 Years to 50 Years" }, "enrollment_count": 6, "start_date": "2013-10", "completion_date": "2013-12", "has_results": false, "last_update_posted_date": "2021-01-19", "last_synced_at": "2026-07-22T00:20:33.249Z", "location_count": 1, "location_summary": "Lincoln, Nebraska", "locations": [ { "city": "Lincoln", "state": "Nebraska" } ], "official_url": "https://clinicaltrials.gov/study/NCT01924143" }, { "nct_id": "NCT04454918", "title": "Study to Assess Absolute Bioavailability (ABA) of TAK-906 and to Characterize Mass Balance, Pharmacokinetics (PK), Metabolism, and Excretion of [14C]-TAK-906 in Healthy Male Participants", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Healthy Volunteers" ], "interventions": [ { "name": "TAK-906 Oral Capsule", "type": "DRUG" }, { "name": "[14C]-TAK-906 Intravenous Infusion", "type": "DRUG" }, { "name": "[14C]-TAK-906 Oral Solution", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Millennium Pharmaceuticals, Inc.", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "19 Years", "maximum_age": "55 Years", "sex": "MALE", "summary": "19 Years to 55 Years · Male only" }, "enrollment_count": 6, "start_date": "2020-07-30", "completion_date": "2020-09-30", "has_results": true, "last_update_posted_date": "2022-03-07", "last_synced_at": "2026-07-22T00:20:33.249Z", "location_count": 1, "location_summary": "Lincoln, Nebraska", "locations": [ { "city": "Lincoln", "state": "Nebraska" } ], "official_url": "https://clinicaltrials.gov/study/NCT04454918" }, { "nct_id": "NCT05225389", "title": "Study to Assess the Absorption, Metabolism, Excretion, and Mass Balance of CT1812 in Healthy Adult Male Subjects", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Alzheimer Disease" ], "interventions": [ { "name": "300 mg [C14] CT1812", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Cognition Therapeutics", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "19 Years", "maximum_age": "55 Years", "sex": "MALE", "summary": "19 Years to 55 Years · Male only" }, "enrollment_count": 8, "start_date": "2021-12-31", "completion_date": "2022-01-24", "has_results": true, "last_update_posted_date": "2023-07-21", "last_synced_at": "2026-07-22T00:20:33.249Z", "location_count": 1, "location_summary": "Lincoln, Nebraska", "locations": [ { "city": "Lincoln", "state": "Nebraska" } ], "official_url": "https://clinicaltrials.gov/study/NCT05225389" }, { "nct_id": "NCT06886269", "title": "A Study to Evaluate How the Body Processes 14C-VX-993 After a Single Oral Dose", "overall_status": "COMPLETED", "study_type": "INTERVENTIONAL", "phases": [ "PHASE1" ], "conditions": [ "Pain" ], "interventions": [ { "name": "14C-VX-993", "type": "DRUG" } ], "intervention_types": [ "DRUG" ], "sponsor": "Vertex Pharmaceuticals Incorporated", "sponsor_class": "INDUSTRY", "healthy_volunteers": true, "eligibility": { "minimum_age": "18 Years", "maximum_age": "55 Years", "sex": "MALE", "summary": "18 Years to 55 Years · Male only" }, "enrollment_count": 8, "start_date": "2025-03-21", "completion_date": "2025-05-17", "has_results": false, "last_update_posted_date": "2025-06-18", "last_synced_at": "2026-07-22T00:20:33.249Z", "location_count": 1, "location_summary": "Lincoln, Nebraska", "locations": [ { "city": "Lincoln", "state": "Nebraska" } ], "official_url": "https://clinicaltrials.gov/study/NCT06886269" } ] }