Combinations comprising (a) a β2 agonist and (b) an antagonist of M3 muscarinic receptors which is 3(R)-(2-hydroxy-2,2-dithien-2-ylacetoxy)-1-(3-phenoxypropyl)-1-azoniabicyclo[2.2.2]octane, in the form of a salt having an anion X, which is a pharmaceutically acceptable anion of a mono or polyvalent acid are useful, e.g., for the treatment of respiratory disease, e.g., asthma or chronic obstructive pulmonary disease.
