{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Constipation-predominant+Irritable+Bowel+Syndrome",
    "query": {
      "condition": "Constipation-predominant Irritable Bowel Syndrome"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 19,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Constipation-predominant+Irritable+Bowel+Syndrome&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-07-22T15:56:51.861Z",
  "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": "NCT01340053",
      "title": "A Study to Evaluate the Safety and Efficacy of RDX5791 for the Treatment of Constipation Predominant Irritable Bowel Syndrome (IBS-C)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Constipation Predominant Irritable Bowel Syndrome"
      ],
      "interventions": [
        {
          "name": "RDX5791",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Ardelyx",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 186,
      "start_date": "2011-05",
      "completion_date": "2012-02",
      "has_results": true,
      "last_update_posted_date": "2019-10-15",
      "last_synced_at": "2026-07-22T15:56:51.861Z",
      "location_count": 16,
      "location_summary": "San Diego, California • Jupiter, Florida • Pinellas Park, Florida + 13 more",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Jupiter",
          "state": "Florida"
        },
        {
          "city": "Pinellas Park",
          "state": "Florida"
        },
        {
          "city": "Rockford",
          "state": "Illinois"
        },
        {
          "city": "Mission",
          "state": "Kansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01340053"
    },
    {
      "nct_id": "NCT00912301",
      "title": "Cheno Effect on Transit in Health and IBS-C",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Constipation-predominant Irritable Bowel Syndrome"
      ],
      "interventions": [
        {
          "name": "Sodium chenodeoxycholate (NaCDC)",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 36,
      "start_date": "2009-04",
      "completion_date": "2009-12",
      "has_results": true,
      "last_update_posted_date": "2012-07-02",
      "last_synced_at": "2026-07-22T15:56:51.861Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00912301"
    },
    {
      "nct_id": "NCT01056107",
      "title": "Effects of ROSE-010 on GI Transit in Constipation Predominant Irritable Bowel Syndrome (C-IBS) Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Irritable Bowel Syndrome Constipation Predominant"
      ],
      "interventions": [
        {
          "name": "ROSE-010",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 65 Years · Female only"
      },
      "enrollment_count": 52,
      "start_date": "2010-01",
      "completion_date": "2011-12",
      "has_results": true,
      "last_update_posted_date": "2013-05-31",
      "last_synced_at": "2026-07-22T15:56:51.861Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01056107"
    },
    {
      "nct_id": "NCT02144753",
      "title": "Use of Novel Prebiotic Fiber for Targeted Dietary Management of Irritable Bowel Syndrome (Nutrabiotix Phase II)",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Constipation-predominant IBS (IBS-C)"
      ],
      "interventions": [
        {
          "name": "NTX-1",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "psyllium (15 g)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "DRUG"
      ],
      "sponsor": "Nutrabiotix, LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 120,
      "start_date": "2014-03",
      "completion_date": "2016-04",
      "has_results": false,
      "last_update_posted_date": "2016-05-02",
      "last_synced_at": "2026-07-22T15:56:51.861Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02144753"
    },
    {
      "nct_id": "NCT01331213",
      "title": "Pregabalin on Colonic Motor and Sensory Function in Constipation Predominant Irritable Bowel Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Irritable Bowel Syndrome"
      ],
      "interventions": [
        {
          "name": "Pregabalin",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Mayo Clinic",
      "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": 18,
      "start_date": "2011-04",
      "completion_date": "2013-02",
      "has_results": true,
      "last_update_posted_date": "2014-03-03",
      "last_synced_at": "2026-07-22T15:56:51.861Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01331213"
    },
    {
      "nct_id": "NCT02686138",
      "title": "A 26-Week Study to Evaluate the Efficacy and Safety of Tenapanor in IBS-C",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Constipation Predominant Irritable Bowel Syndrome"
      ],
      "interventions": [
        {
          "name": "Tenapanor",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Ardelyx",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 593,
      "start_date": "2015-12",
      "completion_date": "2017-10",
      "has_results": true,
      "last_update_posted_date": "2020-04-22",
      "last_synced_at": "2026-07-22T15:56:51.861Z",
      "location_count": 117,
      "location_summary": "Dothan, Alabama • Foley, Alabama • Huntsville, Alabama + 98 more",
      "locations": [
        {
          "city": "Dothan",
          "state": "Alabama"
        },
        {
          "city": "Foley",
          "state": "Alabama"
        },
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Huntsville",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02686138"
    },
    {
      "nct_id": "NCT04043455",
      "title": "Olorinab in Irritable Bowel Syndrome With Predominant Constipation (IBS-C) and Irritable Bowel Syndrome With Predominant Diarrhea (IBS-D)",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Irritable Bowel Syndrome"
      ],
      "interventions": [
        {
          "name": "Olorinab",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Arena Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 273,
      "start_date": "2019-07-24",
      "completion_date": "2021-04-29",
      "has_results": true,
      "last_update_posted_date": "2025-01-30",
      "last_synced_at": "2026-07-22T15:56:51.861Z",
      "location_count": 69,
      "location_summary": "Birmingham, Alabama • Huntsville, Alabama • Chandler, Arizona + 60 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Chandler",
          "state": "Arizona"
        },
        {
          "city": "Gilbert",
          "state": "Arizona"
        },
        {
          "city": "Canoga Park",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04043455"
    },
    {
      "nct_id": "NCT01085643",
      "title": "Effect of Lubiprostone on Small Bowel Contractions in Female Patients With Constipation Irritable Bowel Syndrome (C-IBS)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Constipation-predominant Irritable Bowel Syndrome"
      ],
      "interventions": [
        {
          "name": "Lubiprostone",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Cedars-Sinai Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 4,
      "start_date": "2010-03",
      "completion_date": "2010-12",
      "has_results": true,
      "last_update_posted_date": "2011-12-12",
      "last_synced_at": "2026-07-22T15:56:51.861Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01085643"
    },
    {
      "nct_id": "NCT00934479",
      "title": "Intestinal Microecology in Chronic Constipation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Other Constipation",
        "Irritable Bowel Syndrome"
      ],
      "interventions": [
        {
          "name": "Lubiprostone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 21,
      "start_date": "2010-04",
      "completion_date": "2012-02",
      "has_results": false,
      "last_update_posted_date": "2013-07-17",
      "last_synced_at": "2026-07-22T15:56:51.861Z",
      "location_count": 1,
      "location_summary": "Scottsdale, Arizona",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00934479"
    },
    {
      "nct_id": "NCT00258193",
      "title": "Phase 2 Study of MD-1100 Acetate on Gastrointestinal Transit in Patients With C-IBS",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Irritable Bowel Syndrome"
      ],
      "interventions": [
        {
          "name": "MD-1100 Acetate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Ironwood Pharmaceuticals, 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": 36,
      "start_date": "2006-01",
      "completion_date": "2006-09",
      "has_results": false,
      "last_update_posted_date": "2006-10-20",
      "last_synced_at": "2026-07-22T15:56:51.861Z",
      "location_count": 1,
      "location_summary": "Rochester, Minnesota",
      "locations": [
        {
          "city": "Rochester",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00258193"
    }
  ]
}