Does Fluticasone Propionate Reduce the Late Allergic Reaction When the Drug is Given Post-allergen?


The investigators propose a 3-treatment, placebo-controlled, double-dummy, double-blinded, randomized, crossover study in which single doses of placebo, will be compared to Fluticasone propionate (Flovent Diskus) 250 mcg and budesonide 400 mcg administered after allergen challenge, at cessation of the early allergic reaction (at 20% fall in FEV1 from post-allergen peak)

Full Title of Study: “Does a Lipophilic Steroid Inhaled After an Early Allergic Reaction Affect the Late Reaction?”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Crossover Assignment
    • Primary Purpose: Basic Science
    • Masking: Double (Participant, Investigator)
  • Study Primary Completion Date: November 2008

Detailed Description

The aim of this pilot study is to evaluate whether fluticasone propionate affects the late allergic reaction after a single dose post-allergen challenge administered following cessation of the early allergic reaction. Six subjects with mild asthma will be asked to volunteer for the study.The diagnosis of asthma will be and includes the presence of variable airflow limitation and AHR (PC20 methacholine < 16 mg/mL). Subjects will be asked to participate if they demonstrate an allergen-induced early and late asthmatic response of at least 20% and 15% reduction in FEV1, respectively. The study will consist of 4 periods, composed of a screening allergen period with 3 subsequent allergen challenge/treatment periods. Each period will be separated with a washout of at least 2 weeks. Subjects who demonstrate a dual asthmatic response in the screening period will be selected for randomization to treatment.


  • Drug: Fluticasone propionate (Flovent Diskus) 250 mcg
    • Flovent Diskus 250 mcg
  • Drug: budesonide 400 mcg
    • budesonide 400 mcg
  • Other: Placebo
    • Placebo

Arms, Groups and Cohorts

  • Active Comparator: 1
    • Fluticasone propionate (Flovent Diskus) 250 mcg
  • Active Comparator: 2
    • budesonide 400mcg
  • Placebo Comparator: 3
    • placebo

Clinical Trial Outcome Measures

Primary Measures

  • The Magnitude of the Early Asthmatic Response, Expressed as a Percentage Change in FEV1.
    • Time Frame: Before inhalation 3 hours
  • The Magnitude of the Late Asthmatic Response, Expressed as a Percentage Change in FEV1.
    • Time Frame: 7 hours after challenge

Secondary Measures

  • The Magnitude of Allergen-induced Airway Hyperresponsiveness (Methacholine PC20) and Inflammation (Sputum Eosinophils).
    • Time Frame: Before inhalation both evaluations (0 hours)
  • The Magnitude of Allergen-induced Airway Hyperresponsiveness (Methacholine PC20) and Inflammation (Sputum Eosinophils)
    • Time Frame: sputum @ 7 hours
  • The Magnitude of Allergen-induced Airway Hyperresponsiveness (Methacholine PC20) and Inflammation (Sputum Eosinophils)
    • Time Frame: 24 hours methacholine and sputum

Participating in This Clinical Trial

Inclusion Criteria

  • mild asthma – nonsmokers – allergen-induced early and late asthmatic response Exclusion Criteria:

  • no medication other than infrequent ( < twice weekly) inhaled beta2-agonists – not be exposed to sensitizing allergens – asthma exacerbation or respiratory tract infection in the past4 weeks

Gender Eligibility: All

Minimum Age: 18 Years

Maximum Age: 60 Years

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • Hamilton Health Sciences Corporation
  • Collaborator
    • AstraZeneca
  • Provider of Information About this Clinical Study
    • Sponsor
  • Overall Official(s)
    • Paul O’Byrne, MD, Principal Investigator, McMaster University
    • Gail Gauvreau, PhD, Study Director, McMaster University


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