The present invention is a method of treating an mammal selected from the group consisting of humans and horses who has asthma, COPD or allergic rhinitis and is in need of such treatment by inhaling an anti-asthma, anti-COPD anti-allergic rhinitis effective amount, respectively, of a compound selected from the group consisting of tolterodine ##STR1## hydroxytolterodine and 2-(diisopropylamino)ethyl-1-phenylcyclopentanecarboxylate and pharmaceutically acceptable salts thereof.