Benzocaine-Induced Methemoglobinemia

Methemoglobinemia Caused by Topical Teething Preparation: A Case Report

“…Studies indicate accidental ingestions of benzocaine-containing products only rarely lead to MetHb and this complication may be idiosyncratic and not dose related [4]. Reports of topical preparations as a cause of MetHb in community settings are scarce [1]. Although it remains an infrequently encountered entity, physicians not familiar with this disorder may face diagnostic dilemmas, as its presentation can be idiosyncratic and often nonspecific.…”

“…Benzocaine (ethyl aminobenzoate), a topical anesthetic, has been reported to cause acquired MetHb, most frequently when used during endoscopic and other ambulatory procedures. Reports of severe MetHb following benzocaine-containing preparations in the community are very rare [1]. We present this entity through an unusual case of severe MetHb in a 5-year-old child, caused by unattended self-use of a benzocainecontaining, pain-relief gel for teething.…”