or next layer above reservoir 24 is an extended contact 26 which could be incorporated as one face of battery 28 which is the next layer contact 26 could be any suitable conductive material preferably body conformable to permit applicator 10 so as to be curved or bent to conform to the shaped surface of the skin suitable materials of this type are well known in the art and include electrically conductive polymers preferably non ionic carbon loaded or surface metalized plastics are also available for such use battery 28 comprising the next layer can be made up of a group of cells internally connected in series to obtain the desired voltage necessary to obtain the electrophoretic action with the particular medicament orientation of battery 28 would depend on whether the charged ionic particles of the drug of choice are positive or negative if the particles are negatively charged in solution or suspension then contact 26 would be connected to the negative side of battery 28 as the skin will then be positive with respect to that contact and will attract the ions with regard to battery 28 it should be noted that any conventional miniaturized battery cells now generally available can be employed arranged and connected in series to obtain the desired operating voltage in addition the technology now exists for batteries which are made up of very thin flexible sheets of a conductive polymer with high surface areas relative to thickness to provide adequate current densities one such so called plastic battery is described in 34 batteries today 34 autumn 1981 pages 10.