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Evaluating Factors Involved in Dymista's Superior Clinical Efficacy to Fluticasone Propionate in the Treatment of Seasonal Allergic Rhinitis

Information source: University of Chicago
ClinicalTrials.gov processed this data on August 23, 2015
Link to the current ClinicalTrials.gov record.

Condition(s) targeted: Allergic Rhinitis

Intervention: Placebo (Drug); Fluticasone propionate (Drug); Fluticasone/Azelastine nasal spray (Drug); Nasal Allergen Challenge (Procedure)

Phase: Phase 4

Status: Recruiting

Sponsored by: University of Chicago

Overall contact:
Fuad M Baroody, MD, Phone: 773-702-4790, Email: fbaroody@surgery.bsd.uchicago.edu


Dymista, a combined product containing the antihistamine azelastine and the intranasal steroid fluticasone, provides superior clinical efficacy to both fluticasone propionate and azelastine hydrochloride in the treatment of seasonal allergic rhinitis. The superiority of efficacy not only occurs at the initiation of treatment, but persists for its duration. The mechanism underlying the superior efficacy of Dymista is not known. This trial focuses on examining the effects of Dymista on the dynamics of the allergic response in man using nasal provocation with antigen. The investigators will study the relationship between symptoms, physiology, cells and mediators.

Clinical Details

Official title: Evaluating Factors Involved in Dymista's Superior Clinical Efficacy to Fluticasone Propionate in the Treatment of Seasonal Allergic Rhinitis

Study design: Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Crossover Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Basic Science

Primary outcome: Albumin level in nasal lavage

Secondary outcome: Sneezes after allergen challenge

Detailed description: The main hypothesis for the trial is that Dymista affects multiple phases of the allergic response, which in sum are greater than the effects of fluticasone propionate or azelastine hydrochloride alone. Our objectives for this study are to demonstrate: 1. that the induction of allergic inflammation by nasal provocation with antigen causes a cellular infiltration, with subsequent release of inflammatory biomarkers that cause augmented responses to subsequent exposure to antigens. 2. that fluticasone prevents allergic inflammation from developing after antigen challenge and subsequently prevents the augmentation of the nasal response to nasal challenge with antigen. 3. that the azelastine in Dymista reduces the effects of released histamine To address these hypotheses we will perform a 3-way, randomized, placebo-controlled, and crossover trial. We will recruit 20 asymptomatic seasonal allergic rhinitis patients outside of the relevant season. The subjects will receive placebo, fluticasone propionate and Dymista. The nasal provocations will be separated by 2 weeks. Treatment will begin 15 minutes before nasal provocation with ragweed or grass antigen and the treatment will continue twice a day for 3 days. Nasal provocation will occur daily for three days to evaluate for priming (increased sensitization with repeated antigen exposure, which mimics seasonal disease where antigen exposure occurs in the setting of continued allergic inflammation). For outcome measures, we will monitor both nasal symptoms after nasal provocation as well as collect nasal lavage to evaluate effects on eosinophils and biomarkers of the immune response. In the nasal lavage, we will quantify the number of eosinophils (a marker of cellular recruitment) and measure the levels of histamine (a marker of basophil and mast cell activation), tryptase (a marker of mast cell activation), albumin (a marker of vascular permeability), lactoferrin (a marker of glandular activation) and ECP (a marker of eosinophil activation). Thus we expect to generate information on both clinical effects and physiologic differences between the treatments.


Minimum age: 18 Years. Maximum age: 55 Years. Gender(s): Both.


Inclusion Criteria: 1. Males and females between 18 and 55 years of age. 2. History of grass and/or ragweed allergic rhinitis. 3. Positive skin test to grass and/or ragweed antigen. 4. Positive response to screening nasal challenge. 5. Off all anti-allergic medications for a minimum of 2 weeks. Exclusion Criteria: 1. Physical signs or symptoms suggestive of renal, hepatic or cardiovascular disease. 2. Pregnant or lactating women. 3. Upper respiratory infection within 14 days of study start.

Locations and Contacts

Fuad M Baroody, MD, Phone: 773-702-4790, Email: fbaroody@surgery.bsd.uchicago.edu

The University of Chicago Medicine, Chicago, Illinois 60637, United States; Recruiting
Fuad M Baroody, MD, Phone: 773-702-4790, Email: fbaroody@surgery.bsd.uchicago.edu
Debbie Hawes, Phone: 773-702-4790, Email: dhawes@surgery.bsd.uchicago.edu
Additional Information

Starting date: February 2015
Last updated: March 24, 2015

Page last updated: August 23, 2015

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