{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Placebo+to+match+sofosbuvir",
    "query": {
      "intervention": "Placebo to match sofosbuvir"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 7,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-16T07:51:44.280Z",
  "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": "NCT01542788",
      "title": "Sofosbuvir + Ribavirin for 12 Weeks in Subjects With Chronic Genotype 2 or 3 Hepatitis C Infection Who Are Interferon Intolerant, Interferon Ineligible or Unwilling to Take Interferon",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Chronic Hepatitis C"
      ],
      "interventions": [
        {
          "name": "SOF",
          "type": "DRUG"
        },
        {
          "name": "RBV",
          "type": "DRUG"
        },
        {
          "name": "Placebo to match SOF",
          "type": "DRUG"
        },
        {
          "name": "Placebo to match RBV",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Gilead Sciences",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 278,
      "start_date": "2012-03",
      "completion_date": "2013-02",
      "has_results": true,
      "last_update_posted_date": "2014-05-19",
      "last_synced_at": "2026-09-16T07:51:44.280Z",
      "location_count": 50,
      "location_summary": "Birmingham, Alabama • Coronado, California • Los Angeles, California + 40 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Coronado",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01542788"
    },
    {
      "nct_id": "NCT01188772",
      "title": "Sofosbuvir in Combination With Pegylated Interferon and Ribavirin and in Treatment-Naive Hepatitis C-infected Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hepatitis C Virus"
      ],
      "interventions": [
        {
          "name": "Sofosbuvir",
          "type": "DRUG"
        },
        {
          "name": "Placebo to match sofosbuvir",
          "type": "DRUG"
        },
        {
          "name": "PEG",
          "type": "DRUG"
        },
        {
          "name": "RBV",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Gilead Sciences",
      "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": 147,
      "start_date": "2010-08",
      "completion_date": "2012-05",
      "has_results": true,
      "last_update_posted_date": "2014-04-21",
      "last_synced_at": "2026-09-16T07:51:44.280Z",
      "location_count": 22,
      "location_summary": "Montgomery, Alabama • Anaheim, California • Coronado, California + 17 more",
      "locations": [
        {
          "city": "Montgomery",
          "state": "Alabama"
        },
        {
          "city": "Anaheim",
          "state": "California"
        },
        {
          "city": "Coronado",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01188772"
    },
    {
      "nct_id": "NCT01435044",
      "title": "Safety Study of Regimens of Sofosbuvir, GS-0938, and Ribavirin in Patients With Chronic Hepatitis C Infection",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hepatitis C, Chronic"
      ],
      "interventions": [
        {
          "name": "Sofosbuvir",
          "type": "DRUG"
        },
        {
          "name": "GS-0938",
          "type": "DRUG"
        },
        {
          "name": "RBV",
          "type": "DRUG"
        },
        {
          "name": "Placebo to match sofosbuvir",
          "type": "DRUG"
        },
        {
          "name": "Placebo to match GS-0938",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Gilead Sciences",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 239,
      "start_date": "2011-09",
      "completion_date": "2013-05",
      "has_results": false,
      "last_update_posted_date": "2014-02-06",
      "last_synced_at": "2026-09-16T07:51:44.280Z",
      "location_count": 42,
      "location_summary": "Montgomery, Alabama • Bakersfield, California • Coronado, California + 33 more",
      "locations": [
        {
          "city": "Montgomery",
          "state": "Alabama"
        },
        {
          "city": "Bakersfield",
          "state": "California"
        },
        {
          "city": "Coronado",
          "state": "California"
        },
        {
          "city": "La Mesa",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01435044"
    },
    {
      "nct_id": "NCT02607735",
      "title": "Safety and Efficacy of Sofosbuvir/Velpatasvir/Voxilaprevir in Adults With Chronic HCV Infection Who Have Previously Received Treatment With Direct-Acting Antiviral Therapy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Hepatitis C"
      ],
      "interventions": [
        {
          "name": "SOF/VEL/VOX",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Gilead Sciences",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 416,
      "start_date": "2015-11-11",
      "completion_date": "2017-06-21",
      "has_results": true,
      "last_update_posted_date": "2019-03-05",
      "last_synced_at": "2026-09-16T07:51:44.280Z",
      "location_count": 43,
      "location_summary": "Long Beach, California • Los Angeles, California • Palo Alto, California + 40 more",
      "locations": [
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "Pasadena",
          "state": "California"
        },
        {
          "city": "Rialto",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02607735"
    },
    {
      "nct_id": "NCT02185794",
      "title": "Study to Evaluate Safety, Tolerability, Pharmacokinetics, and Antiviral Activity of Voxilaprevir in Adults With Chronic Hepatitis C Virus Infection",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Hepatitis C Virus Infection"
      ],
      "interventions": [
        {
          "name": "Voxilaprevir",
          "type": "DRUG"
        },
        {
          "name": "Placebo to match voxilaprevir",
          "type": "DRUG"
        },
        {
          "name": "SOF/VEL",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Gilead Sciences",
      "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": 101,
      "start_date": "2014-06-13",
      "completion_date": "2015-09-28",
      "has_results": true,
      "last_update_posted_date": "2020-09-17",
      "last_synced_at": "2026-09-16T07:51:44.280Z",
      "location_count": 10,
      "location_summary": "Costa Mesa, California • DeLand, Florida • Orlando, Florida + 7 more",
      "locations": [
        {
          "city": "Costa Mesa",
          "state": "California"
        },
        {
          "city": "DeLand",
          "state": "Florida"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "Kansas City",
          "state": "Missouri"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02185794"
    },
    {
      "nct_id": "NCT01604850",
      "title": "Sofosbuvir + Ribavirin for 12 or 16 Weeks in Treatment Experienced Subjects With Chronic Genotype 2 or 3 HCV Infection (FUSION)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Chronic Hepatitis C"
      ],
      "interventions": [
        {
          "name": "SOF",
          "type": "DRUG"
        },
        {
          "name": "RBV",
          "type": "DRUG"
        },
        {
          "name": "Placebo to match SOF",
          "type": "DRUG"
        },
        {
          "name": "Placebo to match RBV",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Gilead Sciences",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 202,
      "start_date": "2012-06",
      "completion_date": "2013-05",
      "has_results": true,
      "last_update_posted_date": "2014-05-28",
      "last_synced_at": "2026-09-16T07:51:44.280Z",
      "location_count": 51,
      "location_summary": "Coronado, California • Los Angeles, California • San Diego, California + 41 more",
      "locations": [
        {
          "city": "Coronado",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01604850"
    },
    {
      "nct_id": "NCT01054729",
      "title": "Dose-Ranging Study of Sofosbuvir in Combination With Pegylated Interferon and Ribavirin in Treatment Naïve GT 1 HCV Patients",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Hepatitis C"
      ],
      "interventions": [
        {
          "name": "Sofosbuvir",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "PEG",
          "type": "DRUG"
        },
        {
          "name": "RBV",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Gilead Sciences",
      "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": 64,
      "start_date": "2010-01",
      "completion_date": "2011-08",
      "has_results": true,
      "last_update_posted_date": "2014-04-17",
      "last_synced_at": "2026-09-16T07:51:44.280Z",
      "location_count": 6,
      "location_summary": "San Francisco, California • Gainesville, Florida • Orlando, Florida + 3 more",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "Durham",
          "state": "North Carolina"
        },
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01054729"
    }
  ]
}