摘要：

The present invention relates to a backing layer impermeable to active substance, at least based transdermal therapeutic matrix layer and the protective layer is removed prior to use of the active substance polyacrylate fentanyl or a fentanyl analog system (the TTS), characterized in that the polyacrylate is self-adhesive and not having a carboxyl group, which has a saturation solubility for fentanyl of 3-20 wt%, preferably 4-12 wt% of the saturated solubility, particularly preferably 5-10 wt% of the saturated solubility, the active material layer and the active material embedded at least 80 wt% present in dissolved form in the molecular dispersion.

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