{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Metformin+Concentration",
    "query": {
      "condition": "Metformin Concentration"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 8,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-06-10T13:58:54.778Z",
  "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": "NCT00187681",
      "title": "Organic Cation Transporter 1 (OCT1), on Response to Metformin in Healthy Subjects",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Other Conditions That May Be A Focus of Clinical Attention"
      ],
      "interventions": [
        {
          "name": "Metformin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "18 Years to 40 Years"
      },
      "enrollment_count": 20,
      "start_date": "2003-07",
      "completion_date": "2008-03",
      "has_results": true,
      "last_update_posted_date": "2013-01-08",
      "last_synced_at": "2026-06-10T13:58:54.778Z",
      "location_count": 1,
      "location_summary": "San Francsico, California",
      "locations": [
        {
          "city": "San Francsico",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00187681"
    },
    {
      "nct_id": "NCT01677299",
      "title": "Assessing the PK and Effect on Glucose and GI Hormone Concentrations of Metformin Delayed-Release in Subjects With T2DM",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Type 2 Diabetes Mellitus"
      ],
      "interventions": [
        {
          "name": "EFB0027 (metformin delayed release)",
          "type": "DRUG"
        },
        {
          "name": "EFB0026 (metformin immediate-release)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Elcelyx Therapeutics, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "19 Years to 70 Years"
      },
      "enrollment_count": 24,
      "start_date": "2012-05",
      "completion_date": "2012-09",
      "has_results": true,
      "last_update_posted_date": "2016-09-20",
      "last_synced_at": "2026-06-10T13:58:54.778Z",
      "location_count": 2,
      "location_summary": "Tempe, Arizona • Lincoln, Nebraska",
      "locations": [
        {
          "city": "Tempe",
          "state": "Arizona"
        },
        {
          "city": "Lincoln",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01677299"
    },
    {
      "nct_id": "NCT01525225",
      "title": "Study of Saxagliptin, 5-Hydroxy Saxagliptin, and Metformin Concentrations/Levels in Pediatric Subjects With T2DM",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Type 2 Diabetes Mellitus"
      ],
      "interventions": [
        {
          "name": "Metformin immediate release (IR)",
          "type": "DRUG"
        },
        {
          "name": "Saxagliptin",
          "type": "DRUG"
        },
        {
          "name": "Metformin IR",
          "type": "DRUG"
        },
        {
          "name": "Saxagliptin/Metformin XR FDC",
          "type": "DRUG"
        },
        {
          "name": "Metformin XR",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AstraZeneca",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "10 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "10 Years to 17 Years"
      },
      "enrollment_count": 4,
      "start_date": "2012-09",
      "completion_date": "2013-06",
      "has_results": true,
      "last_update_posted_date": "2015-06-22",
      "last_synced_at": "2026-06-10T13:58:54.778Z",
      "location_count": 7,
      "location_summary": "Little Rock, Arkansas • Los Angeles, California • Louisville, Kentucky + 3 more",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Louisville",
          "state": "Kentucky"
        },
        {
          "city": "Kansas City",
          "state": "Missouri"
        },
        {
          "city": "Toledo",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01525225"
    },
    {
      "nct_id": "NCT00187720",
      "title": "Genetic Basis for Variation in the Renal Elimination of Metformin",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Other Conditions That May Be A Focus of Clinical Attention"
      ],
      "interventions": [
        {
          "name": "Metformin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "18 Years to 40 Years"
      },
      "enrollment_count": 23,
      "start_date": "2002-05",
      "completion_date": "2008-04",
      "has_results": true,
      "last_update_posted_date": "2013-01-10",
      "last_synced_at": "2026-06-10T13:58:54.778Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00187720"
    },
    {
      "nct_id": "NCT04141163",
      "title": "Metformin in Patients With Fragile X",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Fragile X Syndrome"
      ],
      "interventions": [
        {
          "name": "Metformin",
          "type": "DRUG"
        },
        {
          "name": "Placebo oral tablet",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Rowan University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "MALE",
        "summary": "18 Years to 50 Years · Male only"
      },
      "enrollment_count": 40,
      "start_date": "2019-10-29",
      "completion_date": "2021-03",
      "has_results": false,
      "last_update_posted_date": "2019-10-31",
      "last_synced_at": "2026-06-10T13:58:54.778Z",
      "location_count": 1,
      "location_summary": "Stratford, New Jersey",
      "locations": [
        {
          "city": "Stratford",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04141163"
    },
    {
      "nct_id": "NCT02184832",
      "title": "Dietary Intake of Tryptophan and Metformin Response",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Metformin Response",
        "Fasting Glucose",
        "Tryptophan Concentration",
        "Metformin Concentration",
        "Diet Tolerability"
      ],
      "interventions": [
        {
          "name": "Metformin",
          "type": "DRUG"
        },
        {
          "name": "Low tryptophan diet",
          "type": "OTHER"
        },
        {
          "name": "High tryptophan diet",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "20 Years to 40 Years"
      },
      "enrollment_count": 20,
      "start_date": "2014-08",
      "completion_date": "2016-03",
      "has_results": false,
      "last_update_posted_date": "2016-03-16",
      "last_synced_at": "2026-06-10T13:58:54.778Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02184832"
    },
    {
      "nct_id": "NCT05076877",
      "title": "A Study of Lazertinib (JNJ-73841937) in Healthy Participants",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Lazertinib",
          "type": "DRUG"
        },
        {
          "name": "Midazolam",
          "type": "DRUG"
        },
        {
          "name": "Rosuvastatin",
          "type": "DRUG"
        },
        {
          "name": "Metformin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Janssen Research & Development, LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "18 Years to 55 Years"
      },
      "enrollment_count": 20,
      "start_date": "2021-09-17",
      "completion_date": "2022-02-10",
      "has_results": false,
      "last_update_posted_date": "2022-06-27",
      "last_synced_at": "2026-06-10T13:58:54.778Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05076877"
    },
    {
      "nct_id": "NCT00187798",
      "title": "Impact of Genetics on Metformin Pharmacokinetics",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Other Conditions That May Be A Focus of Clinical Attention"
      ],
      "interventions": [
        {
          "name": "Metformin HCl",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "18 Years to 40 Years"
      },
      "enrollment_count": 24,
      "start_date": "2001-08",
      "completion_date": "2007-07",
      "has_results": false,
      "last_update_posted_date": "2012-09-25",
      "last_synced_at": "2026-06-10T13:58:54.778Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00187798"
    }
  ]
}