Iontocaine, is the anesthetic medication used in conjunction with the stimulator (Phoresor PM900) and electrodes (IOMED IOGEL, Small), branded by both the name Numby and Phoresor PM900 by IOMED inc. It is a local anesthetic with vasoconstrictor, administered via iontophoresis through the skin. It can numb up to 10 mm of skin as quick as 10 minutes. It is a 2% lidocaine, 0.01 mg/ml epinephrine solution. It was manufactured by IOMED, Inc.
Iontocaine was approved by the United States Food and Drug Administration on 21 December 1995. It was discontinued by the manufacturer in 2005.