What is Iontophoresis?

Image 1. Clinical demonstration of iontophoresis (courtesy of novaphysicaltherapy.com)
References
1) Amalia Stefanou, N. M. (2012). A Randomized Study Comparing Corticosteroid Injection to Corticosteroid Iontophoresis for Lateral Epicondylitis. Journal of Hand Surgery, 104-109.
2) Delcerda, F. (1982). A Comparative Sudy of Three Methods of Treatment for Shoulder Girdle Myofascial Syndrome. The Journal of Orthopaedic and Sports Physical Therapy, 51-54.
3) Nitin Dixit, V. B. (2007). Iontophoresis-An Approach for Controlled Drug Delivery. Current Drug Delivery, 1-10.
4) Robert Nirschl, D. R. (2003). Iontophoretic Administration of Dexamethasone Sodium Phosphate for Acute Epicondylitis. The American Journal of Sports Medicine, 189-195.
4) Scott Gudeman, S. E. (1997). Treatment of Plantar Fasciitis by Iontophoresis of 0.4% Dexamethasone. The American Journal of Sports Medicine, 312-316.
5) Swati Rawat, S. V. (2008). Transdermal Delivery by Iontophoresis. Indian Journal of Pharmaceutical Sciences, 5-10.