Sub-Sensitivity to Long-Acting Bronchodilators (LABA)

The purpose of this study is to look at whether Advair® and SYMBICORT® have different effects on airway constriction by means of methacholine challenge testing.

Study Overview

• Status: Completed
• Conditions: Asthma
• Intervention / Treatment: Drug: fluticasone propionate and salmeterol; Drug: budesonide and formoterol

• Study Type: Interventional
• Enrollment (Actual): 20
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Colorado
    • Denver, Colorado, United States, 80206
      • National Jewish Health

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 14 years to 61 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• 20 subjects males or females 18-65 years of age with physician diagnosed asthma Diagnosis of asthma > 12 months Currently on 2 puffs SABA bid. Baseline percent FEV1 of greater than 60% and less than or equal to 100% 12% reversibility in the previous 12 months 12% reversibility at Screening Visit Positive MTC (≤ 8mg/ml) at the end of 2 week Run-In Currently symptomatic with ACT score less than 19 at the end of run in on ICS ≥ 200 and ≤ 400 ug/day Non-smoker or ex-smoker with < 10 pk year who stopped > 1 year ago

Exclusion Criteria:

• Asthma exacerbation, significant airflow obstruction, or respiratory infection between Visits 0 and 2. Patients who fail screening because of one of these events may be re-screened once (at least 4 weeks after recovery from the event).

Pre-existing lung disease other than asthma, including active infections Clinically significant medical disease that is uncontrolled despite treatment or is likely in the opinion of the investigator to require a change in therapy during the study Noncompliance or inability to participate in all assessments. Current smoker or former smoker with a lifetime smoking history of ≥ 10 pack-years. A current smoker is defined as someone who has smoked one or more cigarettes per day (or marijuana or a pipe or cigar) for >/= 30 days within the 24 months prior to Visit 1.

Any individual who smokes (cigarettes, marijuana, pipe, or cigar) occasionally, even if for < 30 days in the 24 months Prior to Visit 1, must agree to abstain from all smoking from the time of consent through completion.

History of substance abuse that may impair or risk the patient's full participation in the study, in the judgment of the investigator.

Participation in another interventional clinical trial (including a trial of an approved drug or an interventional study that does not include medication) within 30 days or 5 half-lives of the investigational agent, whichever is longer.

Women with a positive urine pregnancy test.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Active Comparator: fluticasone propionate and salmeterol	Drug: fluticasone propionate and salmeterol; 45/4.5 two puffs twice daily; Other Names: Advair; Drug: budesonide and formoterol; 80/4.5 two puffs twice daily; Other Names: Symbicort
Active Comparator: budesonide and formoterol	Drug: fluticasone propionate and salmeterol; 45/4.5 two puffs twice daily; Other Names: Advair; Drug: budesonide and formoterol; 80/4.5 two puffs twice daily; Other Names: Symbicort

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Improvement in PC20	Improvements in PC20 as measured by methacholine challenge between the two treatment groups at the end of the first 4 week period to determine efficacy between low dose Advair and Symbicort.	A baseline methacholine challenge was compared to the methacholine challenge performed after 4 weeks of treatment for each arm.

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Changes in FEV1	Changes in peak pre-bronchodilator FEV1 [measured at hours 10, 11, 12 post evening dose] over the four week treatment periods and over each 12 hour dosing period (pre evening dose FEV1).	Study Completion

Collaborators and Investigators

• Sponsor: National Jewish Health
• Investigators: Principal Investigator: Rohit K Katial, M.D., National Jewish Health

Study record dates

Study Major Dates

• Study Start: March 1, 2010
• Primary Completion (Actual): September 1, 2013
• Study Completion (Actual): September 1, 2013

Study Registration Dates

• First Submitted: May 3, 2010
• First Submitted That Met QC Criteria: May 3, 2010
• First Posted (Estimated): May 5, 2010

Study Record Updates

• Last Update Posted (Actual): July 6, 2026
• Last Update Submitted That Met QC Criteria: June 9, 2026
• Last Verified: June 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Immune System Diseases; Respiratory Tract Diseases; Lung Diseases; Bronchial Diseases; Lung Diseases, Obstructive; Respiratory Hypersensitivity; Hypersensitivity, Immediate; Hypersensitivity; Asthma; Organic Chemicals; Pharmaceutical Preparations; Polycyclic Compounds; Amines; Pregnanes; Steroids; Fused-Ring Compounds; Alcohols; Amino Alcohols; Androstadienes; Androstenes; Androstanes; Ethanolamines; Phenethylamines; Ethylamines; Pregnenediones; Pregnenes; Drug Combinations; Salmeterol Xinafoate; Albuterol; Fluticasone; Fluticasone-Salmeterol Drug Combination; Formoterol Fumarate; Budesonide, Formoterol Fumarate Drug Combination; Budesonide
• Other Study ID Numbers: GSK LABA