Conditions: Asthma
Keywords: Asthma dry powder inhaler long-acting beta2-agonist bronchodilation bronchodilator metered dose inhaler inhaled corticosteroid
Allocation: RANDOMIZED | Intervention model: CROSSOVER
Enrollment: 72
Healthy volunteers: no

Brief summary:
The primary objective of this study is to evaluate the dose response, efficacy, and safety of 4 different doses of salmeterol Spiromax (6.25, 12.5, 25, and 50 mcg) each combined with a fixed dose of fluticasone propionate (100 mcg) delivered as Fluticasone/Salmeterol Spiromax® Inhalation Powder (FS Spiromax) when administered as a single dose in subjects 12 years of age and older with persistent asthma.

Detailed description:
This was a multicenter, randomized, double-blind and open-label active-controlled, single-dose, 6 period crossover, dose-ranging study conducted in male and female subjects ages 12 years and older with persistent asthma.

Fluticasone propionate multidose dry powder inhaler (Fp MDPI) 50 mcg was provided (to replace the subject's current inhaled corticosteroid (ICS)) throughout the 14 day run-in period and each of the washout periods between treatments. Subjects were instructed to administer 2 inhalations of Fp MDPI 50 mcg (100 mcg total dose) twice daily during the run-in and washout periods. All other medications for the treatment of asthma were discontinued at or prior to the screening visit.

A short-acting β2-adrenergic agonist (SABA), salbuterol HFA, MDI, was provided (to replace the subject's current rescue medication) for symptomatic relief of asthma symptoms in each the run-in, treatment, and washout periods.

Treatment period lasted 5 weeks with a 5 to 7 day washout between each of the six single dose treatments:

* fluticasone propionate/salmeterol xinafoate multidose dry powder inhaler (FS MDPI) given in doses of 6.25, 12.5, 25, or 50 mcg of salmeterol xinafoate in blinded fashion.
* fluticasone propionate multidose dry powder inhaler (Fp MDPI) 100 mcg in blinded fashion
* ADVAIR DISKUS, 100/50 mcg in open-label fashion

Arms:
arm 1: Subjects inhaled a single dose of 100 mcg fluticasone propionate and 6.25 mcg salmeterol xinafoate. arm 2: Subjects inhaled a single dose of 100 mcg fluticasone propionate and 12.5 mcg salmeterol xinafoate. arm 3: Subjects inhaled a single dose of 100 mcg fluticasone propionate and 25 mcg salmeterol xinafoate. arm 4: Subjects inhaled a single dose of 100 mcg fluticasone propionate and 50 mcg salmeterol xinafoate. arm 5: Subjects inhaled a single dose of 100 mcg fluticasone propionate. arm 6: Subjects inhaled a single dose of 100 mcg fluticasone propionate and 50 mcg salmeterol xinafoate. This arm is the only arm which is open-label because the inhaler device was different than the MDPI used in the other treatment arms.

Interventions: intervention 1: Fp MDPI intervention 2: FS MDPI intervention 3: Advair Diskus intervention 4: Albuterol
Intervention descriptions: intervention 1: Fp MDPI is an inhalation-driven multidose dry powder inhaler (MDPI) containing fluticasone propionate dispersed in a lactose monohydrate excipient and contained within a reservoir. A metered dose of drug is delivered to a dose cup via an air pulse activated when the cap is opened.

Fp at 100 mcg was an active comparator (single dose). Further, participants were instructed to administer two inhalations of Fp MDPI 50 mcg twice daily (100 mcg total dose) during the Run-in (to replace the participant's current inhaled corticosteroid) and Washout Periods between treatments. intervention 2: FS MDPI is an inhalation-driven multidose dry powder inhaler (MDPI) containing fluticasone propionate and salmeterol xinafoate dispersed in a lactose monohydrate excipient and contained within a reservoir. A metered dose of drug is delivered to a dose cup via an air pulse activated when the cap is opened. The fluticasone propionate component was a fixed dose of 100 mcg. The salmeterol xinofoate dosage varied: 6.25, 12.5, 25 or 50 mcg. intervention 3: ADVAIR DISKUS (100/50 mcg fluticasone propionate/salmeterol xinafoate) consists of a dry powder formulation of fluticasone propionate and salmeterol xinafoate in a lactose excipient. The dry powder is contained within individual blisters on a double foil strip within the device. Activation of the device opens a single blister of medication which is then dispersed into the air-stream by patient inhalation. intervention 4: Albuterol (Pro-Air) hydrofluoroalkane (HFA) metered dose inhaler (MDI), was provided to be used as needed for the relief of asthma symptoms during both the run-in and treatment periods (to replace the subject's current rescue medication).

Protocol document: