申请人:Euroceltique S.A.
公开号:EP0208395A1
公开(公告)日:1987-01-14
A transdermal delivery system (1,11) for the transdermal administration of a drug has
(a) a backing (2,12) that is substantially impermeable to the drug,
(b) a matrix (3,13), adjacent to a surface of the backing, the matrix containing a gel comprising a hydrophilic fluid, a fluid gelling agent and the drug, and
(c) a perforated sheet (4,14), adjacent to the matrix, that allows passage of the drug containing gel through its perforations.
Preferably the system also has a contact adhesive layer (5,15) and a protecting layer (6,16).
The long term adhesion of the delivery system to a patient may be effected by forming a channel (17), surrounding the matrix, in the perforated sheet/contact adhesive layer lamina. The channel inhibits the lateral movement of the drug containing gel. Furthermore, by forming a weak seal (18) in the matrix surrounding channel, the loss of a volatile drug from the gel may also be prevented.
用于透皮给药的透皮给药系统(1,11)具有以下特点
(a) 背衬(2,12),基本上不透药、
(b) 基质(3,13),紧邻背衬表面,基质含有凝胶,凝胶由亲水性流体、流体胶凝剂和药物组成,以及
(c) 与基质相邻的穿孔片(4,14),允许含有药物的凝胶通过其穿孔。
该系统最好还有一个接触粘合层(5,15)和一个保护层(6,16)。
通过在穿孔片/接触粘合层薄层中形成围绕基质的通道(17),可实现给药系统与患者的长期粘合。该通道可抑制含药凝胶的横向移动。此外,通过在通道周围的基质中形成弱密封(18),还可以防止凝胶中挥发性药物的流失。