If a patient is allergic to sulfites, which local anesthetic would you avoid?

If a patient is allergic to sulfites, which local anesthetic would you avoid?

• A. Articaine with epinephrine
• B. Lidocaine with epinephrine
• C. Mepivacaine with levonordefrin
• D. Prilocaine with epinephrine

Answer: (A)

In patients with a sulfite allergy, you avoid local anesthetics that contain sulfite preservatives in the vasoconstrictor solution. Articaine combined with epinephrine is typically formulated with a sulfite preservative (sodium metabisulfite) to stabilize the epinephrine. Because sulfites can trigger allergic reactions in sensitive individuals, this option is the one to avoid. If you need to anesthetize such a patient, choose a formulation without a sulfite preservative or use an anesthetic without a vasoconstrictor, and always check the product label for the preservative contents.

In patients with a sulfite allergy, you avoid local anesthetics that contain sulfite preservatives in the vasoconstrictor solution. Articaine combined with epinephrine is typically formulated with a sulfite preservative (sodium metabisulfite) to stabilize the epinephrine. Because sulfites can trigger allergic reactions in sensitive individuals, this option is the one to avoid. If you need to anesthetize such a patient, choose a formulation without a sulfite preservative or use an anesthetic without a vasoconstrictor, and always check the product label for the preservative contents.