Among common local anesthetics, which agent is listed as avoidable for patients with a sulfa allergy?

Among common local anesthetics, which agent is listed as avoidable for patients with a sulfa allergy?

• A. Articaine
• B. Lidocaine
• C. Prilocaine
• D. Mepivacaine

Answer: (A)

When a patient has a sulfa allergy, the concern is about drugs that contain a sulfonamide group in their chemical structure. Articaine is listed as avoidable for sulfa-allergic patients because its structure includes a sulfonamide moiety, which can raise a cross-reactivity risk. The other common local anesthetics—lidocaine, prilocaine, and mepivacaine—do not contain a sulfonamide group, so they are not flagged for sulfa allergy in standard references. In practice, clinicians often tailor choices to the patient, but for this question, articaine is the one considered avoidable.

When a patient has a sulfa allergy, the concern is about drugs that contain a sulfonamide group in their chemical structure. Articaine is listed as avoidable for sulfa-allergic patients because its structure includes a sulfonamide moiety, which can raise a cross-reactivity risk. The other common local anesthetics—lidocaine, prilocaine, and mepivacaine—do not contain a sulfonamide group, so they are not flagged for sulfa allergy in standard references. In practice, clinicians often tailor choices to the patient, but for this question, articaine is the one considered avoidable.