Nitto-denko Corporation

Eisai R&d Management Co., Ltd.

Sachiko Terashi

Hitoshi Akemi

Kensuke Matsuoka

Yoshihiro Iwao

Keigo Inosaka

Junichi Sekiya

Masato Nishimura

Akinori Hanatani

Shiro Satoda

Satoko Washiro

Sumiyo Nishi

The present invention provides to a patch and a patch preparation having low stretchability, which can be continuously adhered to the skin for a long time without undesirable detachment and marked falling off from the skin due to various factors during adhesion, and specifically provides a low stretchable patch and a patch preparation containing a support and an adhesive layer formed on one surface of the support, wherein a ratio P of the total length W (mm) of curved sections of a planar outer shape of the patch to the total length S (mm) of straight-line sections of the planar outer shape of the patch (W/S) is not more than 1.22, and, when the curved sections are approximated by a circular arc, the radius R (mm) of the circular arc is not less than 0.5 mm.

Patch and patch preparation

The present invention aims at providing an adhesive preparation wherein a drug is sufficiently dissolved in an adhesive layer and is not easily separated from the adhesive layer even during preservation of the adhesive preparation. The present invention provides an adhesive preparation having an adhesive layer on at least one surface of a support, wherein the adhesive layer comprises a first synthetic rubber having a viscosity average molecular weight of 1,600,000-6,500,000, a drug, an organic liquid component and a tackifier. The present invention further provides the aforementioned adhesive preparation, wherein the organic liquid component is contained in the adhesive layer in a proportion of 20 wt % or above relative to the total weight of the adhesive layer.

Drug containing adhesive preparation

Growing community of inventors

Ibaraki, Japan

Sachiko Terashi