Provided is a method for treating chronic obstructive pulmonary disease or chronic bronchitis, or inhibiting bronchospasm, which method comprises use of a powder inhaler to administer to a human patient in need of such treatment an effective amount of a powder inhalant, wherein the powder inhalant comprises 3(R)-(2-hydroxy-2,2-dithien-2-ylacetoxy)-1-(3-phenoxypropyl)-1-azoniabicyclo[2.2.2]octane bromide.