The invention provides certain azetidinyloxyphenylpyrrolidine compounds, particularly compounds of formula I wherein R is hydrogen or methyl, and pharmaceutical compositions thereof. The invention further provides methods of using a compound of formula I to treat overactive bladder.本發明提供某些吖丁啶基氧苯基吡咯啶化合物,更具體而言式I化合物,其中R係氫或甲基;及其醫藥組合物。本發明進一步提供使用式I化合物治療膀胱過動症之方法。