It has been found that the drug-containing polymer discs suitably used with the iontotherapeutic device can be any suitable shape, such as rectangular, circular or square, and the size can range from 5 cm2 to 30 cm2 with a thickness of from about 0.05 to 0.4 cm, a preferred size being up to about 25 cm2 in surface area and about 0.1-0.3 cm in thickness, a more preferred size being 10-20 cm2 in are