Acute Bronchodilator Response of a Single Dose of Atrovent or Berotec on Top of Pharmacodynamic Steady State of Spiriva
Conditions
- Pulmonary Disease, Chronic Obstructive
Interventions
- DRUG: Tiotropium + placebo
- DRUG: Tiotropium + ipratropium
- DRUG: Tiotropium + fenoterol
Sponsor
Boehringer Ingelheim