Soterix Medical has won clearance from the FDA to introduce its IontoDC iontophoresis medication delivery system. Mostly meant for introducing soluble salt ions, but also fentanyl for pain control, into the body, the device relies on battery power to generate low current (up to 2 milliamperes) electricity that with it moves the drugs through the skin. The current can be adjusted between 1 and 2 milliamperes, depending on the drug to be deliv...