Drug delivery device and method are provided, to case controls drug. One equipment (50) includes a reservoir (60), includes a drug (58). Reservoir (60) is limited by the wall (64) with a water penetration part, so that water penetration part allows water to enter equipment (50) taken in conjunction drug (58). One opening of one plug (56) xegregating unit (50) inhibited, so that of short duration microchannels (62) form, it is between an elastic portion (54) for equipment (50) and the plug (56) of inhibition, through the generation of an enough pressure within reservoir (60), drug (58) are discharged from equipment (50). Also describe treatment patient be the neurogenic detrusor hyperactivity hyperkinesia as caused by spinal cord injury and/or be idiopathic overactive bladder and aconuresis method.
