Conditions: Chronic Obstructive Pulmonary Disease
Keywords: chronic obstructive pulmonary disease COPD indacaterol
Allocation: RANDOMIZED | Intervention model: CROSSOVER
Enrollment: 68
Healthy volunteers: no

Brief summary:
This study was conducted to provide detailed information on the efficacy of indacaterol in terms of its effect on spirometry assessed forced expiratory volume in 1 second (FEV1) over a 24 hour time period.

Detailed description:

Arms:
arm 1: In treatment period 1, patients received indacaterol 300 μg once daily for 14 days via single-dose dry-powder inhaler (SDDPI); in treatment period 2, patients received placebo to indacaterol once daily for 14 days via SDDPI; and in treatment period 3, patients received salmeterol 50 μg twice daily for 14 days via multi-dose dry-powder inhaler (MDDPI). There was a washout period of 14 days between each treatment period. Indacaterol and placebo to indacaterol were administered double-blind; salmeterol was administered open-label. Daily inhaled corticosteroid treatment (if applicable) was to remain stable throughout the study. The short-acting β2-agonist salbutamol/albuterol was available for rescue use throughout the study. arm 2: In treatment period 1, patients received placebo to indacaterol once daily for 14 days via single-dose dry-powder inhaler (SDDPI); in treatment period 2, patients received salmeterol 50 μg twice daily for 14 days via multi-dose dry-powder inhaler (MDDPI); and in treatment period 3, patients received indacaterol 300 μg once daily for 14 days via SDDPI. There was a washout period of 14 days between each treatment period. Indacaterol and placebo to indacaterol were administered double-blind; salmeterol was administered open-label. Daily inhaled corticosteroid treatment (if applicable) was to remain stable throughout the study. The short-acting β2-agonist salbutamol/albuterol was available for rescue use throughout the study. arm 3: In treatment period 1, patients received salmeterol 50 μg twice daily for 14 days via multi-dose dry-powder inhaler (MDDPI); in treatment period 2, patients received indacaterol 300 μg once daily for 14 days via single-dose dry-powder inhaler (SDDPI); and in treatment period 3, patients received placebo to indacaterol once daily for 14 days via SDDPI. There was a washout period of 14 days between each treatment period. Indacaterol and placebo to indacaterol were administered double-blind; salmeterol was administered open-label. Daily inhaled corticosteroid treatment (if applicable) was to remain stable throughout the study. The short-acting β2-agonist salbutamol/albuterol was available for rescue use throughout the study. arm 4: In treatment period 1, patients received placebo to indacaterol once daily for 14 days via single-dose dry-powder inhaler (SDDPI); in treatment period 2, patients received indacaterol 300 μg once daily for 14 days via SDDPI; and in treatment period 3, patients received salmeterol 50 μg twice daily for 14 days via multi-dose dry-powder inhaler (MDDPI). There was a washout period of 14 days between each treatment period. Indacaterol and placebo to indacaterol were administered double-blind; salmeterol was administered open-label. Daily inhaled corticosteroid treatment (if applicable) was to remain stable throughout the study. The short-acting β2-agonist salbutamol/albuterol was available for rescue use throughout the study. arm 5: In treatment period 1, patients received indacaterol 300 μg once daily for 14 days via single-dose dry-powder inhaler (SDDPI); in treatment period 2, patients received salmeterol 50 μg twice daily for 14 days via multi-dose dry-powder inhaler (MDDPI); and in treatment period 3, patients received placebo to indacaterol once daily for 14 days via SDDPI. There was a washout period of 14 days between each treatment period. Indacaterol and placebo to indacaterol were administered double-blind; salmeterol was administered open-label. Daily inhaled corticosteroid treatment (if applicable) was to remain stable throughout the study. The short-acting β2-agonist salbutamol/albuterol was available for rescue use throughout the study. arm 6: In treatment period 1, patients received salmeterol 50 μg twice daily for 14 days via multi-dose dry-powder inhaler (MDDPI); in treatment period 2, patients received placebo to indacaterol once daily for 14 days via single-dose dry-powder inhaler (SDDPI); and in treatment period 3, patients received indacaterol 300 μg once daily for 14 days via SDDPI. There was a washout period of 14 days between each treatment period. Indacaterol and placebo to indacaterol were administered double-blind; salmeterol was administered open-label. Daily inhaled corticosteroid treatment (if applicable) was to remain stable throughout the study. The short-acting β2-agonist salbutamol/albuterol was available for rescue use throughout the study.

Interventions: intervention 1: Indacaterol 300 μg intervention 2: Placebo to indacaterol intervention 3: Salmeterol 50 μg
Intervention descriptions: intervention 1: Indacaterol 300 μg was provided in powder filled capsules with 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 50 μg was provided in powder filled capsules with a multi-dose dry-powder inhaler (MDDPI).

Protocol document: