| abstract |
An iontophoretic agent delivery device (10) having donor and counter electrodes (11, 12) comprised of either metal or a hydrophobic polymer loaded with a conductive filler is provided. The agent reservoir (15) in the donor electrode assembly (8) contains about 10 to 60 wt% hydrophobic polymer, about 10 to 60 wt% hydrophilic polymer, and up to 50 % agent. Similarly, the electrolyte reservoir (16) contains about 10 to 60 wt% hydrophobic polymer, about 10 to 60 wt% hydrophilic polymer, and up to 50 % electrolyte. The agent reservoir (15), the electrolyte reservoir (16) and the electrodes (11, 12) are preferably in the form of films which are laminated to one another. The hydrophobic polymer component in the agent/electrolyte reservoir (15, 16) prevents the reservoir from delaminating from the metal/hydrophobic polymer based electrode (11, 12) even after hydration of the reservoirs (15, 16). |