离子导入法(Iontophoresis)，又称为离子电泳法。离子导入法是利用连续性之直流电流，以同电性相斥的原理，将离子或带电的化学药物驱送至体内的治疗方法。

早在十八世纪末期至十九世纪，就已经有在使用离子电泳法，只是当时人们还不知道这个就叫此名称。

西元一九零三年，LeDuc发现了离子电泳法，利用连续直流电，将生理所需的离子打入身体的表皮及黏膜组织内以达疗效。

至今，此种疗法从原本只物理治疗用来止痛、消水肿等，变成现在热门的美容、美白等相关皮肤导药。

Iontophoresis is a physical process in which ions flow diffusively in a medium driven by an applied electric field. Iontophoresis is to be distinguished from the carriage of uncharged molecules by diffusive fluxes of other molecules, especially of solvent molecules, for example by electro-osmosis, that is to say by flux of uncharged solvent molecules carried as a cross-effect of iontophoresis. These phenomena, directly and indirectly, constitute active transport of matter due to an applied electric field. The transport is measured in units of chemical flux, commonly µmol/cmh. The transport of a charged species of interest may also be measured in terms of a representative electric current, but that current might not be the whole of the current driven by the applied electric field.