Medrx Co., Ltd

Koichi Masaoka

Takashi Oda

Hidetoshi Hamamoto

Katsunori Kobayashi

Masaki Ishibashi

Kiyotsuna Toyohara

Taishi Tanaka

Kazuteru Kohno

Keizo Ikari

The present invention relates to a microneedle and a microneedle array. More specifically, it relates to a microneedle and a microneedle array capable of injecting a drug into the surface layer or horny layer of the skin easily, safely and efficiently.

Microneedle and microneedle array

A microneedle and a microneedle array, which have both aspects of safety and easiness to use and can administer a predetermined dose of a medical agent without causing a pain by smoothly running into the skin surface layer of a patient, includes a frustum and a forward end portion thereon, the forward end portion having a forward end apex angle in the range of 15 to 60&#xb0; and a forward end diameter in the range of 1 to 20 &#x3bc;m and satisfying the expression H/D&#x2267;5, where H is a total height of the microneedle, and D is a diameter of a bottom surface of the frustum).

Microneedle

Growing community of inventors

Tokyo, Japan

Koichi Masaoka