DRUG SOLUTION INJECTION NEEDLE AND TRANSDERMAL DRUG DELIVERY DEVICE

摘要

A drug solution injection needle not only capable of injecting a drug solution from a plurality of sites, but also capable of suppressing difficulty in wheal formation and of restricting injection needle puncture depth. The drug solution injection needle (110) has a plurality of injection needles (115) and a needle support section (111) holding the plurality of injection needles (115). The needle support section (111) has: a needle protrusion surface (113) having the plurality of injection needles (115) protruding therefrom; and a contact piece (112) formed in the needle protrusion surface (113) and coming in contact with the skin such that penetration into the skin by the plurality of injection needles (115) is prevented, when the plurality of injection needles (115) have penetrated the skin to a prescribed depth. The contact section (112) is provided separated from the injection needles (115) such that an observable wheal is formed around each of the plurality of injection needles (115).