A Randomised, Double- Blind, Placebo Controlled, Cross-over Efficacy and Safety Comparison of Tiotropium 5 µg Once Daily and Tiotropium 2.5 µg Twice Daily for Four Weeks in Patients With Moderate Persistent Asthma

Condition:   Asthma
Interventions:   Drug: Placebo;   Drug: Tiotropium 5 µg q.d.;   Drug: Tiotropium 2.5 µg b.i.d.
Sponsors:   Boehringer Ingelheim Pharmaceuticals;   Pfizer
Recruiting – verified September 2010

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