TRANSDERMAL DELIVERY DEVICES

摘要

A transdermal delivery device has active material to be delivered transdermally is contained within a layer of adhesive which is to be placed in contact with the skin in use of the device. The active material is a steroid having the 4-en-3-one structure. On one side of the adhesive layer is provided a backing layer and on the other side a release liner which is easily removable from the adhesive layer for use of the device. At least one of the release liner and the backing layer is porous. Suitable porous materials of synthetic polymer or paper, in the form of a single layer or a laminate, may be used for the release liner and/or backing layer. Loss of the active material on storage is reduced.