Extreme caution should be exercised when using which of the following for localized anesthesia of fingers, toes, or the penis, or in neonates?

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Epinephrine should be used with extreme caution for local anesthesia of fingers, toes, or the penis, or in neonates as it can cause vasoconstriction and potentially lead to tissue necrosis. The other options (A, C, and D) are commonly used local anesthetics and do not have the same risks associated with epinephrine.

Extreme Caution Should Be Exercised When Using Which of the Following