{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=21+mg+transdermal+nicotine",
    "query": {
      "intervention": "21 mg transdermal nicotine"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 39,
    "total_pages": 4,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=21+mg+transdermal+nicotine&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-27T13:58:13.491Z",
  "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": "NCT00218218",
      "title": "Effects of Transdermal Nicotine on Smoking, Craving and Withdrawal in People With Schizophrenia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Schizophrenia and Disorders With Psychotic Features",
        "Tobacco Use Disorder",
        "Schizophrenia"
      ],
      "interventions": [
        {
          "name": "Transdermal Nicotine Patch",
          "type": "DRUG"
        },
        {
          "name": "21 mg transdermal nicotine",
          "type": "DRUG"
        },
        {
          "name": "placebo patch",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute on Drug Abuse (NIDA)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 48,
      "start_date": "2002-06",
      "completion_date": "2005-02",
      "has_results": false,
      "last_update_posted_date": "2017-01-12",
      "last_synced_at": "2026-09-27T13:58:13.491Z",
      "location_count": 2,
      "location_summary": "Providence, Rhode Island",
      "locations": [
        {
          "city": "Providence",
          "state": "Rhode Island"
        },
        {
          "city": "Providence",
          "state": "Rhode Island"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00218218"
    },
    {
      "nct_id": "NCT04045964",
      "title": "Nicotine Patch as an Adjunctive Intervention to Reduce Secondhand Smoke Among NICU Families",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Environmental Tobacco Smoke",
        "Smoking Cessation"
      ],
      "interventions": [
        {
          "name": "nicotine replacement therapy (NRT)",
          "type": "DRUG"
        },
        {
          "name": "motivational advice",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Quitline referral",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BEHAVIORAL"
      ],
      "sponsor": "The University of Texas Health Science Center, Houston",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 32,
      "start_date": "2017-10-29",
      "completion_date": "2018-06-28",
      "has_results": true,
      "last_update_posted_date": "2024-12-11",
      "last_synced_at": "2026-09-27T13:58:13.491Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04045964"
    },
    {
      "nct_id": "NCT00105482",
      "title": "Targeted Interventions for Weight-Concerned Smokers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Nicotine Dependence"
      ],
      "interventions": [
        {
          "name": "Naltrexone",
          "type": "DRUG"
        },
        {
          "name": "Transdermal nicotine replacement",
          "type": "DRUG"
        },
        {
          "name": "Behavioral counseling",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BEHAVIORAL"
      ],
      "sponsor": "Yale University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 172,
      "start_date": "2005-01",
      "completion_date": "2009-10",
      "has_results": true,
      "last_update_posted_date": "2013-03-05",
      "last_synced_at": "2026-09-27T13:58:13.491Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00105482"
    },
    {
      "nct_id": "NCT00224419",
      "title": "Testing Pharmacological Therapies for Pregnant Smokers",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Smoking",
        "Pregnancy"
      ],
      "interventions": [
        {
          "name": "Motivational interviewing for smoking cessation",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Cognitive behaviors therapy",
          "type": "BEHAVIORAL"
        },
        {
          "name": "CBT + NRT",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "DRUG"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 181,
      "start_date": "2003-06",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2014-07-21",
      "last_synced_at": "2026-09-27T13:58:13.491Z",
      "location_count": 2,
      "location_summary": "Durham, North Carolina • Fayetteville, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        },
        {
          "city": "Fayetteville",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00224419"
    },
    {
      "nct_id": "NCT01526005",
      "title": "Brain Nicotine Receptor Density & Response to Nicotine Patch",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Cigarette Smoking"
      ],
      "interventions": [
        {
          "name": "Transdermal Nicotine Patch",
          "type": "DRUG"
        },
        {
          "name": "Transdermal Placebo Patch",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Brentwood Biomedical Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "18 Years to 55 Years"
      },
      "enrollment_count": 50,
      "start_date": "2012-03",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2015-01-27",
      "last_synced_at": "2026-09-27T13:58:13.491Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01526005"
    },
    {
      "nct_id": "NCT01351766",
      "title": "Behavioral Activation Intervention, Reward Processing, and Youth Smoking Cessation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Smoking"
      ],
      "interventions": [
        {
          "name": "Transdermal Nicotine Patch",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Maryland, College Park",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "18 Years to 21 Years"
      },
      "enrollment_count": 39,
      "start_date": "2010-04",
      "completion_date": "2013-05",
      "has_results": true,
      "last_update_posted_date": "2022-05-18",
      "last_synced_at": "2026-09-27T13:58:13.491Z",
      "location_count": 1,
      "location_summary": "College Park, Maryland",
      "locations": [
        {
          "city": "College Park",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01351766"
    },
    {
      "nct_id": "NCT05136690",
      "title": "Evoked Responses as Pharmacodynamic Biomarkers in Healthy and Schizophrenic Participants (MK-4334-007)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Cognitive Impairment Associated With Schizophrenia"
      ],
      "interventions": [
        {
          "name": "Nicotine patch",
          "type": "DRUG"
        },
        {
          "name": "MK-4334",
          "type": "DRUG"
        },
        {
          "name": "Placebo patch",
          "type": "DRUG"
        },
        {
          "name": "Placebo capsule",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Merck Sharp & Dohme 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": 38,
      "start_date": "2022-04-27",
      "completion_date": "2022-11-04",
      "has_results": true,
      "last_update_posted_date": "2024-11-29",
      "last_synced_at": "2026-09-27T13:58:13.491Z",
      "location_count": 2,
      "location_summary": "Long Beach, California • Marlton, New Jersey",
      "locations": [
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Marlton",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05136690"
    },
    {
      "nct_id": "NCT02266784",
      "title": "Contingency Management, Quitting Smoking, and ADHD",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Cigarette Smoking",
        "Smoking Cessation"
      ],
      "interventions": [
        {
          "name": "Contingency Management (CM)",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Transdermal nicotine skin patches (i.e. Habitrol)",
          "type": "DRUG"
        },
        {
          "name": "Supportive Counseling",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "18 Years to 55 Years"
      },
      "enrollment_count": 33,
      "start_date": "2014-10",
      "completion_date": "2017-12-08",
      "has_results": false,
      "last_update_posted_date": "2020-10-19",
      "last_synced_at": "2026-09-27T13:58:13.491Z",
      "location_count": 1,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02266784"
    },
    {
      "nct_id": "NCT01120704",
      "title": "Evaluation of Treatments to Improve Smoking Cessation Medication Adherence",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Smoking",
        "Smoking Cessation",
        "Adherence",
        "Nicotine Dependence",
        "Motivation"
      ],
      "interventions": [
        {
          "name": "Short Term Combination Nicotine Replacement Therapy (patch + gum)",
          "type": "DRUG"
        },
        {
          "name": "Long Term Combination Nicotine Replacement Therapy (patch + gum)",
          "type": "DRUG"
        },
        {
          "name": "Intensive Maintenance Counseling",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Cognitive Medication Adherence Counseling (CAM)",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Electronic Medication Monitoring Device (the Helping Hand) + Feedback",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Automated Adherence Prompting Phone Calls",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BEHAVIORAL"
      ],
      "sponsor": "University of Wisconsin, Madison",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "18 Years to 99 Years"
      },
      "enrollment_count": 544,
      "start_date": "2010-06",
      "completion_date": "2014-05",
      "has_results": true,
      "last_update_posted_date": "2015-12-11",
      "last_synced_at": "2026-09-27T13:58:13.491Z",
      "location_count": 1,
      "location_summary": "Madison, Wisconsin",
      "locations": [
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01120704"
    },
    {
      "nct_id": "NCT01259466",
      "title": "Internet-Administered Smoking Cessation Treatment for Overweight and Obese Smokers",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Smoking Cessation",
        "Overweight",
        "Obesity"
      ],
      "interventions": [
        {
          "name": "Nicotine patch",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Yale University",
      "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": 54,
      "start_date": "2010-07",
      "completion_date": "2013-11",
      "has_results": true,
      "last_update_posted_date": "2015-09-28",
      "last_synced_at": "2026-09-27T13:58:13.491Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01259466"
    }
  ]
}