Abstract: An adhesive polymer matrix for the delivery of an active principle via iontophoresis. The matrix having a first face intended to be applied onto skin and a second face intended to cooperate with electrodes. The matrix comprises electrically conductive zones and at least one electrically insulating zone, each conductive zone being insulated from another conductive zone by an insulating zone. The techniques involve the use of an electric current in order to facilitate the transdermal diffusion of active substances, and relates more particularly to an iontophoresis device.

Abstract: The invention concerns an electrostimulation and/or iontophoresis device comprising a patch (10) suitable for application to a user's skin (12) and a voltage generator (22) suitable for applying a low intensity current through the user's skin by a system of electrodes located in said patch; This device is characterized in that it comprises a self-regulator (16) that varies the voltage supplied by the voltage generator as a function of the continuous measurement of the resistivity of the user's skin beneath said patch The resistance value of the skin provided by an element for measuring the resistance of the skin (24) yields the resistivity measurement.