Medicinal patches for percutaneous administration

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/70 (2006.01) A61K 47/10 (2006.01) A61M 37/00 (2006.01)

Patent

CA 2183960

Disclosed herein is a transdermal skin patch to adhere to a patient's skin, which comprises a water-impermeable backing layer; a liner; and between the two, a multilayer laminated of from 2 to 5 adhesive layers, each of said adhesive layers comprising an active ingredient, an adhesive resin, and a penetration enhancer, wherein each adhesive layer contains no water and has a different water absorption capacity in which the lowest layer which is to be contacted with the skin has the lowest water absorption capacity and the most upper layer in contact with the backing layer has the highest water absorption capacity, and said penetration enhancer being hexylene glycol present in an amount of 0.5 to 40% by weight. The patch of the present invention contains hexylene glycol as a penetration enhancer, which allows an efficient enhancement of the penetration of active ingredient through the skin, as well as can be applied to the skin safely.

Timbre transdermique à appliquer sur la peau d'un patient, qui comporte une couche de support imperméable à l'eau, une garniture et entre les deux, une couche multiple possédant 2 à 5 couches adhésives, chacune desdites couches adhésives contenant un ingrédient actif, une résine adhésive et un adjuvant de pénétration. Lesdites couches adhésives ne contiennent pas d'eau et présentent une capacité différente d'absorption d'eau, la couche inférieure en contact avec la peau ayant la capacité d'absorption d'eau la plus faible et la couche la plus externe en contact avec la couche de support ayant la capacité d'absorption d'eau la plus élevée. Ledit adjuvant de pénétration est de l'hexylène glycol présent à raison de 0,5 à 40 % en poids. Le timbre de la présente invention contient de l'hexylène glycol en tant qu'adjuvant de pénétration, ce qui permet de favoriser de manière efficace la pénétration de l'ingrédient actif à travers la peau. Ledit timbre peut être appliqué sur la peau en toute sécurité.

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