Efficacy and safety of single therapeutic and supratherapeutic doses of indacaterol versus salmeterol and salbutamol in patients with asthma.

Objective: This study compared the bronchodilator efficacy and safety of indacaterol with placebo, salbutamol and salmeterol, in patients with persistent asthma, at single therapeutic and supratherapeutic doses.

Research Design And Methods: This was a randomised, open-label crossover study in adult subjects with asthma (forced expiratory volume in 1 second [FEV(1)] > or = 60% predicted). In part A, patients (n = 20) received single doses of indacaterol 200 microg, salbutamol 200 microg, salmeterol 50 microg and placebo.