Iontocaine was an anesthetic medication, marketed under the two brand names 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 in as little as 10 minutes. It is a 2% lidocaine, 0.01 mg/ml epinephrine solution. It was manufactured by IOMED, Inc.
- United States Food and Drug Administration, Drug Approval Reports
- United States Food and Drug Administration, August 2005: Additions and Deletions to the Drug Product List. 
- IOMED Numby web page from the Internet Archive
- Iontocaine Package Insert from the Internet Archive
- FDA page on iontocaine
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