A patient comes in with a complaint of pruritus and facial swelling.He states that he has been using all of his usual medications and has also been using using an ester local anesthetic on a regular basis for the past 2 to 3 weeks for insect bites.What is the most likely cause of his symptoms?

Question

Quizplus · Accepted Answer

The ester local anesthetics are more often identified when an individual develops an allergic or hypersensitivity reaction after frequent exposure to the drug. Allergic reaction to the esters is usually due to sensitivity to the metabolite para-amino benzoic acid (PABA).

A Patient Comes in with a Complaint of Pruritus and Facial