Conditions: Asthma
Keywords: QMF indacaterol Twisthaler®
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 392
Healthy volunteers: no

Brief summary:
This study will evaluate the dose response relationship among four doses of indacaterol as well as placebo delivered via the TWISTHALER® device.

Detailed description:

Arms:
arm 1: Indacaterol 62.5 μg delivered by the TWISTHALER® device once a day and placebo to formoterol (placebo AEROLIZER® device) twice a day for 14 days. All participants were supplied with salbutamol/albuterol to use throughout the study as rescue medication. arm 2: Indacaterol 125 μg delivered by the TWISTHALER® device once a day and placebo to formoterol (placebo AEROLIZER® device) twice a day for 14 days. All participants were supplied with salbutamol/albuterol to use throughout the study as rescue medication. arm 3: Indacaterol 250 μg delivered by the TWISTHALER® device once a day and placebo to formoterol (placebo AEROLIZER® device) twice a day for 14 days. All participants were supplied with salbutamol/albuterol to use throughout the study as rescue medication. arm 4: Indacaterol 500 μg delivered by the TWISTHALER® device once a day and placebo to formoterol (placebo AEROLIZER® device) twice a day for 14 days. All participants were supplied with salbutamol/albuterol to use throughout the study as rescue medication. arm 5: Formoterol 12 μg delivered by the AEROLIZER® device twice a day and placebo to indacaterol (placebo TWISTHALER® device) once a day for 14 days. All participants were supplied with salbutamol/albuterol to use throughout the study as rescue medication. arm 6: Placebo to indacaterol (placebo TWISTHALER® device) once a day and placebo to formoterol (placebo AEROLIZER® device) twice a day for 14 days. All participants were supplied with salbutamol/albuterol to use throughout the study as rescue medication.

Interventions: intervention 1: indacaterol intervention 2: formoterol intervention 3: placebo to indacaterol intervention 4: placebo to formoterol intervention 5: short acting β2-agonist
Intervention descriptions: intervention 1: Indacaterol delivered by multiple dose dry powder inhaler (TWISTHALER® device). intervention 2: Formoterol delivered by oral inhalation via AEROLIZER® inhalation device. intervention 3: Placebo TWISTHALER® device intervention 4: Placebo AEROLIZER® device intervention 5: 100 μg/ 90 μg salbutamol/albuterol Metered Dose Inhaler (MDI) or equivalent dose of Dry Powder Inhaler (DPI).

Protocol document: