Study objective: To compare the safety of salmeterol xinafoate or placebo added to usual asthma care. Design: A 28-week, randomized, double-blind, placebo-controlled, observational study.

Later, studies on patients with Arg/Arg β 2-receptor polymorphism demonstrated a similar efficacy of tiotropium in comparison with salmeterol when both were added to low-dose inhaled corticosteroids.

Fluticasone propionate, salmeterol (as xinafoate); 45mcg/21mcg, 115mcg/21mcg, 230mcg/21mcg; per inh; metered-dose inhaler; CFC-free. Store at room temperature between 68° F and 77° F (20° C and ...