J Med Drug Rev 2011;1;21-28 (Review-Artikel in deutscher Sprache) The standard maintenance therapy of chronic obstructive pulmonary disease (COPD) comprises the anticholinergic tiotropium as well as long-acting ß2-agonists like salmeterol and formoterol. For quite some time now, clinicians have asked for longer-acting ß2-agonists allowing once daily application, enhancing patient compliance […]