# The Effect of Nasal Carbon Dioxide (CO2) on Nasal Congestion in Subjects With Perennial Allergic Rhinitis

> **NCT00638755** · PHASE2 · COMPLETED · sponsor: **Capnia, Inc.** · enrollment: 20 (actual)

## Conditions studied

- Perennial Allergic Rhinitis

## Interventions

- **DRUG:** Nasal Carbon Dioxide
- **DRUG:** Nasal Carbon Dioxide
- **DRUG:** Nasal Carbon Dioxide
- **DRUG:** Nasal Carbon Dioxide

## Key facts

- **NCT ID:** NCT00638755
- **Lead sponsor:** Capnia, Inc.
- **Sponsor class:** INDUSTRY
- **Phase:** PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2008-02
- **Primary completion:** 2008-05
- **Final completion:** 2008-07
- **Target enrollment:** 20 (ACTUAL)
- **Last updated:** 2010-08-19


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00638755

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00638755, "The Effect of Nasal Carbon Dioxide (CO2) on Nasal Congestion in Subjects With Perennial Allergic Rhinitis". Retrieved via AI Analytics 2026-06-24 from https://api.ai-analytics.org/clinical/NCT00638755. Licensed CC0.

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