The present invention provides medicines useful for the prevention or treatment of urinary frequency or incontinence. That is, the present invention relates to a medicine comprising combination of a phenoxyacetic acid derivative represented by the following general formula (I) (wherein R 1 represents a hydroxy group or a lower alkoxy group) or a pharmaceutically acceptable salt thereof, or a hydrate or solvate thereof and an ±1 adrenoceptor blocker, which exerts an excellent effect decreasing intra-bladder pressure or prolonging micturition interval and useful for the prevention or treatment of urinary frequency or incontinence.
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