{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=RO4917523",
    "query": {
      "intervention": "RO4917523"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 9,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-06T08:43:06.862Z",
  "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": "NCT01517698",
      "title": "A Study of RO4917523 in Patients With Fragile X Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Fragile X Syndrome"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "RO4917523 0.5 mg",
          "type": "DRUG"
        },
        {
          "name": "RO4917523 1.5 mg",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Hoffmann-La Roche",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "14 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "14 Years to 50 Years"
      },
      "enrollment_count": 185,
      "start_date": "2012-05",
      "completion_date": "2014-04",
      "has_results": false,
      "last_update_posted_date": "2016-07-11",
      "last_synced_at": "2026-09-06T08:43:06.862Z",
      "location_count": 20,
      "location_summary": "Phoenix, Arizona • Long Beach, California • Sacramento, California + 17 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01517698"
    },
    {
      "nct_id": "NCT00809562",
      "title": "A Study of RO4917523 in Patients With Treatment Resistant Depression",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Depression"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "RO4917523",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Hoffmann-La Roche",
      "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": 46,
      "start_date": "2009-03",
      "completion_date": "2011-02",
      "has_results": false,
      "last_update_posted_date": "2016-11-02",
      "last_synced_at": "2026-09-06T08:43:06.862Z",
      "location_count": 9,
      "location_summary": "Oceanside, California • San Diego, California • New Haven, Connecticut + 4 more",
      "locations": [
        {
          "city": "Oceanside",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "New Haven",
          "state": "Connecticut"
        },
        {
          "city": "Shreveport",
          "state": "Louisiana"
        },
        {
          "city": "Flowood",
          "state": "Mississippi"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00809562"
    },
    {
      "nct_id": "NCT01873508",
      "title": "A Study of Three Modified-Release Formulations of RO4917523 in Healthy Volunteers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy Volunteer"
      ],
      "interventions": [
        {
          "name": "RO4917523",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Hoffmann-La Roche",
      "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": 24,
      "start_date": "2013-06",
      "completion_date": "2013-08",
      "has_results": false,
      "last_update_posted_date": "2015-09-10",
      "last_synced_at": "2026-09-06T08:43:06.862Z",
      "location_count": 1,
      "location_summary": "Marlton, New Jersey",
      "locations": [
        {
          "city": "Marlton",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01873508"
    },
    {
      "nct_id": "NCT01045083",
      "title": "A Study of the Ability of Functional Magnetic Resonance Imaging (fMRI) to Detect and Characterize the Effects of Two Marketed Centrally Active Drugs, Placebo, and RO4917523 in Healthy Volunteers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy Volunteer"
      ],
      "interventions": [
        {
          "name": "RO4917523",
          "type": "DRUG"
        },
        {
          "name": "escitalopram",
          "type": "DRUG"
        },
        {
          "name": "methylphenidate",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Hoffmann-La Roche",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "ALL",
        "summary": "18 Years to 45 Years"
      },
      "enrollment_count": 25,
      "start_date": "2010-01",
      "completion_date": "2011-06",
      "has_results": false,
      "last_update_posted_date": "2016-11-02",
      "last_synced_at": "2026-09-06T08:43:06.862Z",
      "location_count": 1,
      "location_summary": "La Jolla, California",
      "locations": [
        {
          "city": "La Jolla",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01045083"
    },
    {
      "nct_id": "NCT01483469",
      "title": "A Human Proof of Concept Study for [11C]-RO5011232 as Radiotracer and Study of the Binding of RO4917523 to Human mGlu5 Brain Receptor at Steady-State in Healthy Volunteers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy Volunteer"
      ],
      "interventions": [
        {
          "name": "RO4917523",
          "type": "DRUG"
        },
        {
          "name": "RO5011232",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Hoffmann-La Roche",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 56,
      "start_date": "2011-12",
      "completion_date": "2013-10",
      "has_results": false,
      "last_update_posted_date": "2016-11-02",
      "last_synced_at": "2026-09-06T08:43:06.862Z",
      "location_count": 2,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01483469"
    },
    {
      "nct_id": "NCT01437657",
      "title": "MARIGOLD Study: A Study of RO4917523 Versus Placebo as Adjunctive Therapy in Patients With Major Depressive Disorder and an Inadequate Response to Ongoing Antidepressant Therapy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Major Depressive Disorder"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "RO4917523 0.5 mg",
          "type": "DRUG"
        },
        {
          "name": "RO4917523 1.5 mg",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Hoffmann-La Roche",
      "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": 319,
      "start_date": "2011-10",
      "completion_date": "2013-09",
      "has_results": false,
      "last_update_posted_date": "2016-11-02",
      "last_synced_at": "2026-09-06T08:43:06.862Z",
      "location_count": 28,
      "location_summary": "Little Rock, Arkansas • Costa Mesa, California • Garden Grove, California + 22 more",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Costa Mesa",
          "state": "California"
        },
        {
          "city": "Garden Grove",
          "state": "California"
        },
        {
          "city": "Oceanside",
          "state": "California"
        },
        {
          "city": "Orange",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01437657"
    },
    {
      "nct_id": "NCT01368926",
      "title": "A Pharmacokinetic Study of RO4917523 in Healthy Japanese and Caucasian Subjects",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy Volunteer"
      ],
      "interventions": [
        {
          "name": "RO4917523",
          "type": "DRUG"
        },
        {
          "name": "placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Hoffmann-La Roche",
      "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": 42,
      "start_date": "2011-06",
      "completion_date": "2011-11",
      "has_results": false,
      "last_update_posted_date": "2016-11-02",
      "last_synced_at": "2026-09-06T08:43:06.862Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01368926"
    },
    {
      "nct_id": "NCT01015430",
      "title": "A Study With RO4917523 in Patients With Fragile X Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Fragile X Syndrome"
      ],
      "interventions": [
        {
          "name": "Placebo (for RO4917523 ascending doses)",
          "type": "DRUG"
        },
        {
          "name": "Placebo (for RO4917523 fixed dose)",
          "type": "DRUG"
        },
        {
          "name": "RO4917523",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Hoffmann-La Roche",
      "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": 40,
      "start_date": "2009-11",
      "completion_date": "2011-01",
      "has_results": false,
      "last_update_posted_date": "2016-11-02",
      "last_synced_at": "2026-09-06T08:43:06.862Z",
      "location_count": 5,
      "location_summary": "Sacramento, California • Decatur, Georgia • Chicago, Illinois + 2 more",
      "locations": [
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Decatur",
          "state": "Georgia"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Indianapolis",
          "state": "Indiana"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01015430"
    },
    {
      "nct_id": "NCT01750957",
      "title": "A Study of RO4917523 in Pediatric Patients With Fragile X Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Fragile X Syndrome"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "RO4917523",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Hoffmann-La Roche",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "13 Years",
        "sex": "ALL",
        "summary": "5 Years to 13 Years"
      },
      "enrollment_count": 47,
      "start_date": "2013-02",
      "completion_date": "2014-04",
      "has_results": false,
      "last_update_posted_date": "2016-08-11",
      "last_synced_at": "2026-09-06T08:43:06.862Z",
      "location_count": 20,
      "location_summary": "Long Beach, California • Sacramento, California • San Diego, California + 17 more",
      "locations": [
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01750957"
    }
  ]
}