Patent attributes
It is intended to provide an interface for a transdermal drug administration device that can supply a drug almost evenly and favorably from a plurality of projections through skin. This interface for a transdermal drug administration device has a flat plate 8. The flat plate 8 comprises a plurality of two-dimensionally arranged conical or pyramidal projections 6 capable of piercing skin and a plurality of openings 7 capable of delivering a drug which are respectively arranged in correspondence with the projections. The openings 7 are respectively arranged in proximity to their corresponding projections 6. The flat plate 8 can be made of a metal or ceramics. The ratio between the number of the openings and the number of the projections can be 1:1 to 1:2.
