Iontophoretic device incorporating an electrotransport adhesive

An electrically powered iontophoretic agent delivery device including a donor electrode assembly, a counter electrode assembly and a source of electrical power adapted to be electrically connect to the donor electrode assembly and the counter electrode assembly, the donor electrode assembly including:

• a) an agent reservoir containing an agent, the agent reservoir adapted to be placed in agent transmitting relation with a body surface;
• b) a donor electrode adapted to be electrically connected to the source of electrical power, the donor electrode being in electrical contact with the agent reservoir;
• and
• c) a two phase adhesive disposed between the agent reservoir and the body surface for adhering the donor electrode assembly to the body surface, the adhesive comprising an adhesive hydrophobic polymer phase and about 15 to 60 wt. % on a dry weight basis of a hydrophilic polymer phase distributed through the hydrophobic polymer phase, the hydrophilic phase forming upon hydration an interconnecting network of the hydrophilic polymer throughout the matrix, the network providing aqueous pathways for passage of the agent through the matrix.