Which of the following local anesthetics causes methemoglobinemia:-: (A) Lignocaine, (B) Benzocaine, (C) Chloroprocaine, (D) Dibucaine
Answer is B. Methemoglobinemia * Benzocaine * Prilocaine * EMLA Cream (Lignocainee + Prilocaine) Physiologically Iron in Hb is Fe2+ If iron in Hb is Fe3+ - Methemoglobin Rx: IV Methylene Blue