TRANSDERMAL THERAPEUTIC SYSTEM COMPRISING A RESERVOIR-TYPE PRESSURE-SENSITIVE ADHESIVE LAYER AND A BACK LAYER WITH UNI-DIRECTIONAL RESILIENCE

摘要

The present invention relates to a transdermal therapeutic system such as a patch that comprises a protection layer which can be removed several times, a reservoir-type pressure-sensitive adhesive layer and a back layer which is optionally coated with an adhesive. The back layer comprises a material having an uni-directional and preferably longitudinal resilience of at least 20 %. This transdermal therapeutic system is mainly intended for use as a patch which is applied for several days and is used for treating conditions such as pain or drug-addiction.