Independent directory Public ClinicalTrials.gov records United States
Clear filters

These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.

ClinicalTrials.gov public records Last synced Oct 2, 2026, 3:20 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–9 of 9 matching trials from the live ClinicalTrials.gov search.
Conditions
Seasonal Allergic Rhinitis
Interventions
Nasal CO2, Inactive Placebo Gas
Drug
Lead sponsor
Capnia, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Omaha, Nebraska
Conditions
Migraine
Interventions
Nasal CO2, Inactive Placebo
Drug
Lead sponsor
Capnia, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
292 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
15
States / cities
Birmingham, Alabama • Stanford, California • East Hartford, Connecticut + 12 more
Conditions
Seasonal Allergic Rhinitis
Interventions
Nasal CO2, Inactive Placebo Gas
Drug
Lead sponsor
Capnia, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
St Louis, Missouri
Conditions
Perennial Allergic Rhinitis
Interventions
Nasal Carbon Dioxide
Drug
Lead sponsor
Capnia, Inc.
Industry
Eligibility
19 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008
U.S. locations
1
States / cities
Omaha, Nebraska
Conditions
Trigeminal Neuralgia
Interventions
Carbon Dioxide Drug Delivery System (CDDS)
Drug
Lead sponsor
Capnia, Inc.
Industry
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
6
States / cities
Los Angeles, California • Tampa, Florida • New York, New York + 3 more
Conditions
Temporomandibular Disorders, Pain, Headaches
Interventions
Nasal Carbon Dioxide, Air
Drug · Other
Lead sponsor
Capnia, Inc.
Industry
Eligibility
18 Years to 70 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
1
States / cities
Seattle, Washington
Conditions
Cluster Headache
Interventions
Nasal Carbon Dioxide
Drug
Lead sponsor
Cady, Roger, M.D.
Individual
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Springfield, Missouri
Conditions
Migraine
Interventions
Nasal Carbon Dioxide, Placebo
Drug
Lead sponsor
Capnia, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
3
States / cities
San Diego, California • Bethesda, Maryland • Portsmouth, Virginia
Completed Not applicable Interventional Results available

Intranasal CO2 for Allergic Rhinitis

NCT00618410
Conditions
Allergic Rhinitis
Interventions
Carbon dioxide, USP, Placebo
Device · Other
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 45 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008
U.S. locations
1
States / cities
Chicago, Illinois