| abstract |
A transdermal therapeutic system (TTS), in particular a patch, is described, comprising: n a detectable protective layer n a pressure-sensitive adhesive reservoir layer and n a backing layer with or without a coating of pressure-sensitive adhesive and featuring a unintentionally, preferably longitudinally, elastic material having an elasticity of at least 20%. The TTS is particularly suitable for use as a multi-day plaster, for the treatment, for instance, of pain or of drug dependency. |