i·on·to·pho·re·sis 
(ī-ŏn′tə-fə-rēsĭs)
(ī-ŏn′tə-fə-rēsĭs)n.
The use of an electric current to transport an ionized substance, especially a drug, through the skin.
[From Greek ion, iont-, something that goes; see ION + -PHORESIS.]
i·on′to·pho·retic (-rĕtĭk) adj.