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  • Title: EMLA-induced methemoglobinemia and systemic topical anesthetic toxicity.
    Author: Hahn IH, Hoffman RS, Nelson LS.
    Journal: J Emerg Med; 2004 Jan; 26(1):85-8. PubMed ID: 14751483.
    Abstract:
    This case report illustrates an adult presenting with the simultaneous occurrence of both methemoglobinemia (MetHb) and systemic toxicity from the topical application of local anesthetics while undergoing laser epilation therapy of the legs. The concurrent development of both is considered uncommon in this setting and may have been related to several factors, including her recent previous treatment, increased absorption secondary to abraded skin with the addition of occlusive dressing, and possible alteration of protein binding and drug metabolism due to the use of medications. The clinical manifestations and mechanisms of MetHb and systemic local anesthetic toxicity are discussed.
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