Embodiments of the invention provide electrode assemblies and associated methods for the iontophoretic transdermal delivery of therapeutic agents. Many embodiments provide a corrosion resistant electrode for the iontophoretic transdermal delivery of various therapeutic agents. Such embodiments allow for the iontophoretic transdermal delivery of therapeutic agents such as iron compounds for prolonged periods without any substantial corrosion of the electrode, impedance increases or discoloration or irritation of the skin. Embodiments of the invention are particularly useful for the long term treatment of various chronic medical conditions such as iron deficient anemia.
