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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Environmental Allergy Clear all
Completed Not applicable Interventional

A Study of Tobacco Smoke and Children With Respiratory Illnesses

NCT03062709
View directory record Official record
Conditions
Bronchiolitis, Pneumonia, Reactive Airway Disease, Asthma, Tobacco Smoking, Tobacco Cessation, Bronchopulmonary Dysplasia
Interventions
Breathe Easy Coalition written materials, Maine Tobacco Helpline, Urine cotinine testing
Behavioral · Diagnostic Test
Lead sponsor
MaineHealth
Other
Eligibility
Up to 10 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
1
States / cities
Portland, Maine
Source: ClinicalTrials.gov public record
Updated May 15, 2017 · Synced Sep 21, 2026, 4:41 AM EDT
Completed Not applicable Interventional

Bleach vs. Bubbles: Assessing the Impact of the Bathroom Environment on Eczema

NCT03619161
View directory record Official record
Conditions
Eczema, Atopic Dermatitis, Atopic Dermatitis and Related Conditions
Interventions
Bubbles, Bleach and Bubbles
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
6 Months to 17 Years
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated May 10, 2021 · Synced Sep 21, 2026, 4:41 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Role of TLR4 in Environmental Asthma

NCT00671892
View directory record Official record
Conditions
Asthma
Interventions
Lipopolysaccharide endotoxin
Biological
Lead sponsor
John Sundy
Other
Eligibility
18 Years to 40 Years
Enrollment
855 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001 – 2008
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 15, 2013 · Synced Sep 21, 2026, 4:41 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Sustaining Smoking Cessation in Smokers With Kids With Asthma

NCT00862368
View directory record Official record
Conditions
Asthma, Smoking Cessation
Interventions
PAM, PAM-Enhanced/Asthma Counseling Phone Calls, Follow-Up Phone Calls - Child Wellness Topic
Behavioral
Lead sponsor
The Miriam Hospital
Other
Eligibility
18 Years and older
Enrollment
573 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2011
U.S. locations
5
States / cities
Fall River, Massachusetts • Pawtucket, Rhode Island • Providence, Rhode Island + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 24, 2012 · Synced Sep 21, 2026, 4:41 AM EDT
Completed Not applicable Interventional

PECO Air Purification in Hospital Rooms to Improve Health Outcomes for Pediatric Respiratory Distress

NCT03647397
View directory record Official record
Conditions
Asthma, Pneumonia, Respiratory Distress Syndrome
Interventions
Photo Electrochemical Oxidation (PECO) for Air Purification
Device
Lead sponsor
Molekule
Industry
Eligibility
1 Year to 17 Years
Enrollment
274 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
Rockford, Illinois
Source: ClinicalTrials.gov public record
Updated May 16, 2019 · Synced Sep 21, 2026, 4:41 AM EDT
Completed Not applicable Interventional Results available

The Houston HIITBAC for African Americans

NCT02253433
View directory record Official record
Conditions
Asthma
Interventions
Enhanced Clinic Care, Enhanced Clinic Care + Home Intervention
Other
Lead sponsor
Baylor College of Medicine
Other
Eligibility
18 Years and older
Enrollment
264 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Nov 13, 2018 · Synced Sep 21, 2026, 4:41 AM EDT
Completed Not applicable Interventional Results available

Uncontrolled Lower Respiratory Symptoms in the WTC Survivor Program

NCT02024204
View directory record Official record
Conditions
Lung Diseases, Medication Compliance
Interventions
Fluticasone propionate 230mcg for 3 Months, Current Treatment or no treatment, Salmeterol 21mcg for 3 Months
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 75 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 1, 2021 · Synced Sep 21, 2026, 4:41 AM EDT
Not listed Not applicable Interventional

Houston "Breathe Easy" Healthy Homes-Based Model for Multifamily Rental Communities

NCT05345080
View directory record Official record
Conditions
Asthma, Respiratory Tract Disease, Lung Diseases, Sinusitis, Chronic
Interventions
Exposure-Reduction Intervention
Behavioral
Lead sponsor
Baylor College of Medicine
Other
Eligibility
18 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 5, 2022 · Synced Sep 21, 2026, 4:41 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Dietary Factors and Disfluency: A Look Into Food Allergies and Other Environmental Triggers Associated With Variations in Severity of Vocal Cord Tension.

NCT02547051
View directory record Official record
Conditions
Vocal Cord Tension, Dysfluency Developmental
Interventions
Food Allergy Testing and Elimination Diet
Other
Lead sponsor
The R2 Institute
Other
Eligibility
16 Years to 75 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2022
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Oct 10, 2017 · Synced Sep 21, 2026, 4:41 AM EDT
Completed No phase listed Observational Results available

Home Air Quality Impact for Adults With Asthma

NCT05224076
View directory record Official record
Conditions
Asthma, Environmental Exposure, Home Environment Related Disease
Interventions
Home Air Quality
Other
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years and older
Enrollment
64 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Jul 28, 2025 · Synced Sep 21, 2026, 4:41 AM EDT
Recruiting Not applicable Interventional

The Allergen Reduction and Child Health Study (ARCHS)

NCT04331353
View directory record Official record
Conditions
Asthma in Children
Interventions
Comparator 1 (tailored approach), Comparator 2 (insecticidal bait)
Behavioral
Lead sponsor
Tulane University
Other
Eligibility
5 Years to 17 Years
Enrollment
290 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2028
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Sep 8, 2025 · Synced Sep 21, 2026, 4:41 AM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

Differential Gene Expression in Lung and Peripheral Blood After Inhaled Allergen Challenge

NCT00671593
View directory record Official record
Conditions
Atopic Asthma, Healthy
Interventions
House Dust Mite, Diluent
Biological
Lead sponsor
John Sundy
Other
Eligibility
18 Years to 40 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2009
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 15, 2013 · Synced Sep 21, 2026, 4:41 AM EDT
Completed No phase listed Observational

Identifying Shared Genetic Susceptibility Regions in Chronic Beryllium Disease and Sarcoidosis

NCT00560989
View directory record Official record
Conditions
Sarcoidosis, Berylliosis
Interventions
Not listed
Lead sponsor
National Jewish Health
Other
Eligibility
18 Years to 80 Years
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 25, 2014 · Synced Sep 21, 2026, 4:41 AM EDT
Not listed No phase listed Observational

Healthcare Decisions on Dietary and Environmental Allergen Exposure

NCT03144908
View directory record Official record
Conditions
Dietary Allergy, Environmental Allergy
Interventions
Standard Operating Procedures
Other
Lead sponsor
Data Collection Analysis Business Management
Other
Eligibility
Not listed
Enrollment
200 participants
Timeline
2017 – 2020
U.S. locations
1
States / cities
Land O' Lakes, Florida
Source: ClinicalTrials.gov public record
Updated Jan 22, 2019 · Synced Sep 21, 2026, 4:41 AM EDT
Active, not recruiting No phase listed Observational

Childhood Allergy and the Neonatal Environment

NCT04215783
View directory record Official record
Conditions
Asthma in Children, Allergy
Interventions
Not listed
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
Not listed
Enrollment
499 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
4
States / cities
Detroit, Michigan • St Louis, Missouri • Nashville, Tennessee + 1 more
Source: ClinicalTrials.gov public record
Updated Sep 10, 2026 · Synced Sep 21, 2026, 4:41 AM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

Genetics of Asthma - Bronchoscopy Studies

NCT00644514
View directory record Official record
Conditions
Atopic Asthma, Healthy
Interventions
Endotoxin - lipopolysaccharide (LPS)
Biological
Lead sponsor
John Sundy
Other
Eligibility
18 Years to 40 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 15, 2013 · Synced Sep 21, 2026, 4:41 AM EDT
Completed Phase 2 Interventional Results available

Environmental Control as Add-on Therapy in Childhood Asthma

NCT02251379
View directory record Official record
Conditions
Asthma
Interventions
Flovent Diskus, Home Environmental Intervention, Advair Diskus
Drug · Other
Lead sponsor
Johns Hopkins University
Other
Eligibility
5 Years to 17 Years
Enrollment
155 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 19, 2019 · Synced Sep 21, 2026, 4:41 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Genetics of Environmental Asthma

NCT00018096
View directory record Official record
Conditions
Asthma
Interventions
LPS endotoxin, saline, HDM
Biological
Lead sponsor
National Institute of Environmental Health Sciences (NIEHS)
NIH
Eligibility
18 Years to 40 Years
Enrollment
176 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2001 – 2007
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated May 5, 2008 · Synced Sep 21, 2026, 4:41 AM EDT
Completed Phase 4 Interventional Results available

Assessing the Efficacy of Maxidex® and Patanol® for the Treatment of Allergic Conjunctivitis

NCT01119287
View directory record Official record
Conditions
Allergic Conjunctivitis
Interventions
Dexamethasone 0.1% ophthalmic suspension, Olopatadine hydrochloride 0.1% ophthalmic solution, Inactive ingredients, used as placebo
Drug · Other
Lead sponsor
Alcon Research
Industry
Eligibility
18 Years to 64 Years
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010
U.S. locations
1
States / cities
Fort Worth, Texas
Source: ClinicalTrials.gov public record
Updated Feb 27, 2014 · Synced Sep 21, 2026, 4:41 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Study of Gulf War Illness (GWI) by Comparing GWI and Healthy Veterans

NCT00810225
View directory record Official record
Conditions
Gulf War Illness, Persian Gulf War Syndrome
Interventions
Not listed
Lead sponsor
Georgetown University
Other
Eligibility
Not listed
Enrollment
516 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jun 17, 2018 · Synced Sep 21, 2026, 4:41 AM EDT
Completed Phase 1Phase 2 Interventional Results available

A Methodology Development Environmental Clinical Trial of Reproxalap in Subjects With Seasonal Allergic Conjunctivitis

NCT03660878
View directory record Official record
Conditions
Allergic Conjunctivitis
Interventions
Reproxalap Ophthalmic Solution (0.25%), Reproxalap Ophthalmic Solution (0.5%), Vehicle Ophthalmic Solution
Drug
Lead sponsor
Aldeyra Therapeutics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 7, 2025 · Synced Sep 21, 2026, 4:41 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Personalized Environment and Genes Study

NCT00341237
View directory record Official record
Conditions
Diabetes, Heart Disease, Asthma
Interventions
Not listed
Lead sponsor
National Institute of Environmental Health Sciences (NIEHS)
NIH
Eligibility
18 Years to 120 Years
Enrollment
25,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2010
U.S. locations
2
States / cities
Chapel Hill, North Carolina • Research Triangle Park, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 15, 2026 · Synced Sep 21, 2026, 4:41 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Safety and Efficacy of AL-53817 Nasal Spray Solution

NCT01454505
View directory record Official record
Conditions
Nasal Allergies, Allergies
Interventions
AL-53817 nasal spray solution, Vehicle nasal spray
Drug · Other
Lead sponsor
Alcon Research
Industry
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Fort Worth, Texas
Source: ClinicalTrials.gov public record
Updated May 19, 2013 · Synced Sep 21, 2026, 4:41 AM EDT
Completed No phase listed Observational

Asthma Severity in Children and Environmental Agents

NCT00042705
View directory record Official record
Conditions
Asthma
Interventions
Not listed
Lead sponsor
National Institute of Environmental Health Sciences (NIEHS)
NIH
Eligibility
5 Years to 11 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2012
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 13, 2015 · Synced Sep 21, 2026, 4:41 AM EDT