Conditions: Asthma
Keywords: asthma QAB149 indacaterol long acting β2-agonist bronchodilator
Allocation: RANDOMIZED | Intervention model: CROSSOVER
Enrollment: 41
Healthy volunteers: no

Brief summary:
This study was designed to provide data about the safety and efficacy of 3 doses of indacaterol (150, 300, and 600 µg) in Japanese asthma patients so that an optimal dose, or doses, could be chosen for testing in later studies.

Detailed description:

Arms:
arm 1: In treatment period 1: patients received 2 placebo capsules; in treatment period 2: patients received 1 indacaterol (Ind) 150 μg capsule + 1 placebo capsule; in treatment period 3: patients received 1 indacaterol 300 μg capsule + 1 placebo capsule; and in treatment period 4: patients received 2 indacaterol 300 μg capsules. Two inhalation capsules of study drug were inhaled using a single dose dry powder inhaler (SDDPI) in the morning on day 1 of each treatment period at approximately the same time of day +/- 15 minutes. There was a washout period of 14-28 days between each treatment period. In open label treatment period 5: patients received 100 μg salmeterol (50 μg in the morning, 50 μg twelve hours post initial dose) inhaled via Diskus®, an inhalation device, on Day 1.

Daily inhaled corticosteroid treatment (if applicable) was allowed to remain stable throughout the study. The short acting (beta) β2-agonist (SABA) salbutamol was available for rescue use throughout the study. arm 2: In treatment period 1: patients received 1 indacaterol (Ind) 150 μg capsule + 1 placebo capsule; in treatment period 2: patients received 2 indacaterol 300 μg capsules; in treatment period 3: patients received 2 placebo capsules; and in treatment period 4: patients received 1 indacaterol 300 μg capsule + 1 placebo capsule. Two inhalation capsules of study drug were inhaled using a single dose dry powder inhaler (SDDPI) in the morning on day 1 of each treatment period at approximately the same time of day +/- 15 minutes. There was a washout period of 14-28 days between each treatment period. In open label treatment period 5: patients received 100 μg salmeterol (50 μg in the morning, 50 μg twelve hours post initial dose) inhaled via Diskus®, an inhalation device, on Day 1.

Daily inhaled corticosteroid treatment (if applicable) was allowed to remain stable throughout the study. The short acting (beta) β2-agonist (SABA) salbutamol was available for rescue use throughout the study. arm 3: In treatment period 1: patients received 1 indacaterol (Ind) 300 μg capsule + 1 placebo capsule; in treatment period 2: patients received 2 placebo capsules; in treatment period 3: patients received 2 indacaterol 300 μg capsules; and in treatment period 4: patients received 1 indacaterol 150 μg capsule + 1 placebo capsule. Two inhalation capsules of study drug were inhaled using a single dose dry powder inhaler (SDDPI) in the morning on day 1 of each treatment period at approximately the same time of day +/- 15 minutes. There was a washout period of 14-28 days between each treatment period. In open label treatment period 5: patients received 100 μg salmeterol (50 μg in the morning, 50 μg twelve hours post initial dose) inhaled via Diskus®, an inhalation, device on Day 1.

Daily inhaled corticosteroid treatment (if applicable) was allowed to remain stable throughout the study. The short acting (beta) β2-agonist (SABA) salbutamol was available for rescue use throughout the study. arm 4: In treatment period 1: patients received 2 indacaterol (Ind) 300 μg capsules; in treatment period 2: patients received 1 indacaterol 300 μg capsule + 1 placebo capsule; in treatment period 3: patients received 1 indacaterol 150 μg capsule + 1 placebo capsule; and in treatment period 4: patients received 2 placebo capsules. Two inhalation capsules of study drug were inhaled using a single dose dry powder inhaler (SDDPI) in the morning on day 1 of each treatment period at approximately the same time of day +/- 15 minutes. There was a washout period of 14-28 days between each treatment period. In open label treatment period 5: patients received 100 μg salmeterol (50 μg in the morning, 50 μg twelve hours post initial dose) inhaled via Diskus®, an inhalation device, on Day 1.

Daily inhaled corticosteroid treatment (if applicable) was allowed to remain stable throughout the study. The short acting (beta) β2-agonist (SABA) salbutamol was available for rescue use throughout the study.

Interventions: intervention 1: Indacaterol intervention 2: Placebo intervention 3: Salmeterol
Intervention descriptions: intervention 1: In the morning, powder filled capsules inhaled using a single dose dry powder inhaler (SDDPI). intervention 2: Placebo to indacaterol was provided in powder filled capsules with a single dose dry powder inhaler (SDDPI). intervention 3: Salmeterol 100 μg total dose taken on Day 1. 50 μg in the morning and 50 μg twelve hours post initial dose inhaled via Diskus®, an inhalation device for Salmeterol.

Protocol document: