Patent ID: 8275454

Claim:
An iontophoresis device activated in use comprising: a drug-containing layer containing a dry drug; an absorber disposed on said drug-containing layer and formed of a material capable of absorbing a liquid; a wall material disposed around said absorber, having an adhesive layer on the undersurface thereof; a support disposed on said absorber and said wall material, having an opening in the central portion thereof; an electrode disposed on the undersurface of said support; a diaphragm disposed on said support; and a dissolution liquid reservoir disposed on said diaphragm, retaining a dissolution liquid for dissolving said drug between said diaphragm and itself, and having a protruding portion for destroying said diaphragm by pressing force, wherein said dissolution liquid reservoir is formed by processing of a sheet material, said protruding portion being formed by molding processing in at least a portion of said dissolution liquid reservoir, wherein said sheet material is a laminated film consisting of a cyclic polyolefin copolymer film and a polyolefin film, or a laminated film consisting of a fluorocarbon resin film and a polyolefin film, and wherein said sheet material has a water vapor permeability of 0.22 g/m 2 ·24 hr or less and has a thickness between about 250 and about 350 μm.