Surgery Which of the following can be used as local anesthetic agent for infiltration if a patient is allergic to amide and ester anaesthetic derivatives A Nitrous oxide B Bupivacaine C Phenylephrine D Diphenhydramine 💡 Explanation Which of the following can be used as local anesthetic agent for infiltration if a patient is allergic to amide and ester anaesthetic derivatives ✓ Correct Answer: D. Diphenhydramine