A comeback for iontophoresis?

Member Rick Osler made the following request:"Iontophosesis has been making a bit of a comeback also for superficial/reactionary pathologies, so maybe worth some discussion?" Hmm.. a comeback ehhh.. did it ever go away? Let's see!

The number of drug molecules approved by the regulatory authorities for transdermal administration is relatively modest – less than two dozen. Many other therapies might benefit from the advantages offered by the transdermal route. There is good evidence for their efficacy for everthing from hyperhidrosis to breast cancer! Iontophoresis can also be used to deliver insulin, antihypertensive medication and anaethetic