| abstract |
A transdermal therapeutic system which is composed of layers exhibits an electrically insulating backing layer (1) being impermeable to active substances, and two galvanic elements which are positioned in separation from each other. The skin-facing electrodes of the galvanic elements have layers thereon consisting of a liquid absorbing material becoming ionically conductive after liquid admission. The layer of at least one of the dermad electrodes comprises a pharmaceutical active substance. |