MICRONEEDLE AND MICRONEEDLE ARRAY
    6.
    发明公开
    MICRONEEDLE AND MICRONEEDLE ARRAY 审中-公开
    微针和微针场

    公开(公告)号:EP2842595A4

    公开(公告)日:2015-12-09

    申请号:EP13782340

    申请日:2013-04-24

    IPC分类号: A61M37/00 A61K9/00

    摘要: A microneedle and a microneedle array which can support not only a drug but also a stabilizer and a thickener in large quantities and have excellent puncture property. The microneedle is used to administer a drug transdermally and comprises a top section, a shaft section and a base section, wherein (i) the tip apex angle (±) is 15 to 60°; (ii) the tip diameter (D 0 ) is 1 to 20 µm; (iii) the area (A 3 ) of the top surface of the base section is larger than the area (A 2 ) of the bottom surface of the shaft section; (iv) the following expressions (1) and (2) are satisfied H / D 4 ‰§ 3 (H is the overall height, and D 4 is the diameter of the bottom surface of the base section) ² ‰§ 90 - 0.5 �¢ ± (² is the angle formed between the side surface of the shaft section and the top surface of the base section, and ± is the tip apex angle.); and (v) a solid composition containing a drug is fixed to the side surface of the shaft section and the following expression (5) is satisfied. 10 �¢ ° ‰¦ ³ ‰¦ 60 �¢ ° (³ is the angle formed by tangent lines connecting the apex of the top section and the surface of the solid composition fixed to the side surface of the shaft section.)