{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Filtered+Cigarettes",
    "query": {
      "intervention": "Filtered Cigarettes"
    },
    "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?intervention=Filtered+Cigarettes&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-04T06:18:29.285Z",
  "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": "NCT04487470",
      "title": "Impact of Cigar Flavor in Dual Users",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Tobacco Use Disorder"
      ],
      "interventions": [
        {
          "name": "Flavored filtered cigars",
          "type": "OTHER"
        },
        {
          "name": "Unflavored filtered cigars",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "UConn Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "34 Years",
        "sex": "ALL",
        "summary": "21 Years to 34 Years"
      },
      "enrollment_count": 89,
      "start_date": "2020-06-24",
      "completion_date": "2024-11-30",
      "has_results": false,
      "last_update_posted_date": "2025-10-07",
      "last_synced_at": "2026-09-04T06:18:29.285Z",
      "location_count": 1,
      "location_summary": "Farmington, Connecticut",
      "locations": [
        {
          "city": "Farmington",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04487470"
    },
    {
      "nct_id": "NCT06105424",
      "title": "BRP1602: Evaluation of Technical and Logistical Feasibility to Measure Lung Permeability",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Tobacco Use",
        "Smoking",
        "Smoking, Tobacco"
      ],
      "interventions": [
        {
          "name": "Lung Permeability Assessment",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "RAI Services Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "30 Years to 50 Years"
      },
      "enrollment_count": 21,
      "start_date": "2016-09-24",
      "completion_date": "2016-12-28",
      "has_results": false,
      "last_update_posted_date": "2023-10-27",
      "last_synced_at": "2026-09-04T06:18:29.285Z",
      "location_count": 1,
      "location_summary": "Lincoln, Nebraska",
      "locations": [
        {
          "city": "Lincoln",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06105424"
    },
    {
      "nct_id": "NCT05157048",
      "title": "Acute Effects of Cigarette Packaging and Charcoal Filtration on Perceptions, Use Behaviors, and Harm Exposure",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Smoking Behaviors"
      ],
      "interventions": [
        {
          "name": "Charcoal-filtered cigarette",
          "type": "OTHER"
        },
        {
          "name": "Non-charcoal filtered cigarette",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Abramson Cancer Center at Penn Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "21 Years to 60 Years"
      },
      "enrollment_count": 42,
      "start_date": "2022-03-10",
      "completion_date": "2023-02-14",
      "has_results": true,
      "last_update_posted_date": "2024-11-07",
      "last_synced_at": "2026-09-04T06:18:29.285Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05157048"
    },
    {
      "nct_id": "NCT05114863",
      "title": "CSD200907: A Study to Assess Elements of Abuse Liability for a Heated Tobacco Product With Four Non-Combusted Cigarette Variants",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Smoking",
        "Smoking Behaviors",
        "Tobacco Use",
        "Tobacco Smoking"
      ],
      "interventions": [
        {
          "name": "Product A1",
          "type": "OTHER"
        },
        {
          "name": "Product B",
          "type": "OTHER"
        },
        {
          "name": "Product C",
          "type": "OTHER"
        },
        {
          "name": "Product D",
          "type": "OTHER"
        },
        {
          "name": "Product A2",
          "type": "OTHER"
        },
        {
          "name": "Product E",
          "type": "OTHER"
        },
        {
          "name": "Product F",
          "type": "OTHER"
        },
        {
          "name": "Product G",
          "type": "OTHER"
        },
        {
          "name": "Product H",
          "type": "OTHER"
        },
        {
          "name": "Product N",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "RAI Services Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "21 Years to 60 Years"
      },
      "enrollment_count": 75,
      "start_date": "2021-11-29",
      "completion_date": "2022-02-27",
      "has_results": false,
      "last_update_posted_date": "2022-06-27",
      "last_synced_at": "2026-09-04T06:18:29.285Z",
      "location_count": 1,
      "location_summary": "Knoxville, Tennessee",
      "locations": [
        {
          "city": "Knoxville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05114863"
    },
    {
      "nct_id": "NCT07348679",
      "title": "Cigarette Filter Study",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Smoking ( Cigarette)"
      ],
      "interventions": [
        {
          "name": "Charcoal filtered cigarettes with marketing",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Charcoal filtered cigarette without marketing",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Non-charcoal filtered cigarettes",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Rutgers, The State University of New Jersey",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "21 Years and older"
      },
      "enrollment_count": 252,
      "start_date": "2026-04-27",
      "completion_date": "2030-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-06-05",
      "last_synced_at": "2026-09-04T06:18:29.285Z",
      "location_count": 1,
      "location_summary": "New Brunswick, New Jersey",
      "locations": [
        {
          "city": "New Brunswick",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07348679"
    },
    {
      "nct_id": "NCT01964807",
      "title": "Cardiovascular Assessment of the Effects of Tobacco and Nicotine Delivery Products",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Adverse Effect of Other Agents Primarily Affecting the Cardiovascular System, Initial Encounter"
      ],
      "interventions": [
        {
          "name": "Cigarette, NIDA test type with 16.6 mg nicotine",
          "type": "OTHER"
        },
        {
          "name": "Cigarette, NIDA test type with <0.45 mg nicotine",
          "type": "OTHER"
        },
        {
          "name": "Electronic cigarette with 18 mg/ml nicotine",
          "type": "OTHER"
        },
        {
          "name": "Electronic Cigarette with no nicotine",
          "type": "OTHER"
        },
        {
          "name": "Moist snuff",
          "type": "OTHER"
        },
        {
          "name": "Sham Smoking",
          "type": "OTHER"
        },
        {
          "name": "Secondhand cigarette smoke (SHS)",
          "type": "OTHER"
        },
        {
          "name": "Conditioned, filtered air",
          "type": "OTHER"
        },
        {
          "name": "Sham Moist Snuff",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 81,
      "start_date": "2013-11-03",
      "completion_date": "2021-05-31",
      "has_results": false,
      "last_update_posted_date": "2021-12-27",
      "last_synced_at": "2026-09-04T06:18:29.285Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01964807"
    },
    {
      "nct_id": "NCT04529551",
      "title": "CSD1601: A Study to Evaluate the Exposure to Tar and Nicotine From Two Cigarette Products That Contain a Menthol Capsule in the Filter",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Smoking",
        "Tobacco Smoking",
        "Tobacco Use"
      ],
      "interventions": [
        {
          "name": "1601A",
          "type": "OTHER"
        },
        {
          "name": "1601B",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "RAI Services Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "21 Years and older"
      },
      "enrollment_count": 55,
      "start_date": "2016-04-08",
      "completion_date": "2016-05-02",
      "has_results": false,
      "last_update_posted_date": "2022-06-27",
      "last_synced_at": "2026-09-04T06:18:29.285Z",
      "location_count": 1,
      "location_summary": "High Point, North Carolina",
      "locations": [
        {
          "city": "High Point",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04529551"
    },
    {
      "nct_id": "NCT04844762",
      "title": "Addiction and Behavior Related to Menthol Cigarette Substitutes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Smoking (Tobacco) Addiction"
      ],
      "interventions": [
        {
          "name": "Menthol cigarettes substitutes",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Usual brand menthol cigarettes and substitutes",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Menthol cigarettes substitutes and menthol cigarettes",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Ohio State University Comprehensive Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 120,
      "start_date": "2019-12-16",
      "completion_date": "2021-08-09",
      "has_results": true,
      "last_update_posted_date": "2024-02-09",
      "last_synced_at": "2026-09-04T06:18:29.285Z",
      "location_count": 1,
      "location_summary": "Columbus, Ohio",
      "locations": [
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04844762"
    },
    {
      "nct_id": "NCT04167384",
      "title": "CSD190301: A Study to Assess Elements of Abuse Liability for Two Dissolvable Nicotine Lozenge Tobacco Products",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Smoking",
        "Tobacco Use",
        "Tobacco Smoking"
      ],
      "interventions": [
        {
          "name": "Product A",
          "type": "OTHER"
        },
        {
          "name": "Product B",
          "type": "OTHER"
        },
        {
          "name": "Product C",
          "type": "OTHER"
        },
        {
          "name": "Product D",
          "type": "OTHER"
        },
        {
          "name": "Product E",
          "type": "OTHER"
        },
        {
          "name": "Product F",
          "type": "OTHER"
        },
        {
          "name": "Product G",
          "type": "OTHER"
        },
        {
          "name": "Product H",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "RAI Services Company",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "21 Years to 60 Years"
      },
      "enrollment_count": 69,
      "start_date": "2019-12-02",
      "completion_date": "2020-02-28",
      "has_results": false,
      "last_update_posted_date": "2020-03-12",
      "last_synced_at": "2026-09-04T06:18:29.285Z",
      "location_count": 1,
      "location_summary": "High Point, North Carolina",
      "locations": [
        {
          "city": "High Point",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04167384"
    },
    {
      "nct_id": "NCT04013256",
      "title": "Controlled Exposure of Healthy Nonsmokers to Secondhand and Thirdhand Cigarette Smoke",
      "overall_status": "SUSPENDED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Pollution; Exposure",
        "Smoke Inhalation",
        "Exposure to Pollution"
      ],
      "interventions": [
        {
          "name": "Cigarette Smoke",
          "type": "OTHER"
        },
        {
          "name": "Clean Air and Clean Clothing/Sham exposure",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 66,
      "start_date": "2020-01-20",
      "completion_date": "2024-10-31",
      "has_results": false,
      "last_update_posted_date": "2023-08-28",
      "last_synced_at": "2026-09-04T06:18:29.285Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04013256"
    }
  ]
}