Which local anesthetic should be avoided in patients with a sulfa allergy?

Which local anesthetic should be avoided in patients with a sulfa allergy?

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

Answer: (A)

Articaine should be avoided in patients with a sulfa allergy because its chemical structure includes a sulfur-containing sulfonamide–related group. In individuals with sulfa allergies, exposure to sulfonamide-containing compounds can trigger hypersensitivity reactions, so using articaine is avoided to minimize risk. The other common local anesthetics—lidocaine, mepivacaine, and prilocaine—do not have that sulfonamide-related feature, so they’re considered suitable alternatives when a sulfa allergy is present.

Articaine should be avoided in patients with a sulfa allergy because its chemical structure includes a sulfur-containing sulfonamide–related group. In individuals with sulfa allergies, exposure to sulfonamide-containing compounds can trigger hypersensitivity reactions, so using articaine is avoided to minimize risk. The other common local anesthetics—lidocaine, mepivacaine, and prilocaine—do not have that sulfonamide-related feature, so they’re considered suitable alternatives when a sulfa allergy is present.