Abstract
To the Editor: Local anesthetic induced methemoglobinemia is a known phenomenon related to the topical administration of benzocaine and prilocaine [1]. Isolated use of lidocaine is generally considered safe, although rare reports associated it with methemoglobinemia [1]. Herein, we describe a patient who developed mild methemoglobinemia with the chronic use of transdermal lidocaine patch. A 48-year-old woman underwent lysis of adhesions and small-bowel resection for intermittent small-bowel obstruction. She had a prior gastric bypass complicated by anastomotic leaks. Due to the long-standing chronic abdominal and low-back pain, she was treated with methadone, hydromorphone, and daily 5% lidocaine patch. Other medications included furosemide, escitalopram, pantoprazole, sumatriptan, and temazepam. Surgery was performed under general anesthesia where the …
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