Effect of Iontophoretic Patterns on in Vivo Antidiuretic Response to Desmopressin Acetate Administered Transdermally

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Abstract
The effects of concentration, amperage and duration on the antidiuretic response induced by iontophoretic delivery of desmopressin acetate (DDAVP) were examined using a diabetes insipidus model in rats. A higher current density brought about a larger and longer antidiuretic response. Prolonged iontophoretic duration caused an overdose. Repeated short iontophoretic treatments with lower current density maintained a constant response with a short lag time and a rapid disappearance of pharmacological response immediately after cessation of the final treatment. This type of iontophoresis substantially reduced the inter-subject variability of response as compared to the response using an intranasal route of administration.