PROBLEM TO BE SOLVED: To provide a drug delivery system that can deliver an agent to a shallow portion of skin reliably.SOLUTION: The present invention provides a percutaneous absorption formulation composed of a solid microneedle that has both terminals like acute needles and contains medicinal components, and an animal medicine, particularly a vaccine formulation, composed of a solid microneedle that has both terminals like acute needles and contains pathogen antigen components.SELECTED DRAWING: None【課題】薬剤を確実に皮膚浅く送達可能な薬物送達システムを提供する。【解決手段】両末端が鋭角の針状であり、薬効成分を含有する中実のマイクロニードルからなる経皮吸収製剤、及び両末端が鋭角の針状であり、病原体の抗原成分を含有する中実のマイクロニードルからなる動物用医薬、特にワクチン製剤。【選択図】なし
