Which is the only local anesthetic that is available with levonordefrin?

Which is the only local anesthetic that is available with levonordefrin?

• A. 2% mepivacine
• B. Lidocaine with levonordefrin
• C. Prilocaine with levonordefrin
• D. Articaine with levonordefrin

Answer: (A)

Levonordefrin acts as a vasoconstrictor to slow the absorption of a local anesthetic, prolonging its effect. In dental practice, the only local anesthetic formulation that is available with levonordefrin is 2% mepivacaine with levonordefrin (typically 1:20,000). Other commonly used anesthetics, such as lidocaine, prilocaine, and articaine, are paired with epinephrine rather than levonordefrin. That makes mepivacaine the unique pairing with levonordefrin among the standard options.

Levonordefrin acts as a vasoconstrictor to slow the absorption of a local anesthetic, prolonging its effect. In dental practice, the only local anesthetic formulation that is available with levonordefrin is 2% mepivacaine with levonordefrin (typically 1:20,000). Other commonly used anesthetics, such as lidocaine, prilocaine, and articaine, are paired with epinephrine rather than levonordefrin. That makes mepivacaine the unique pairing with levonordefrin among the standard options.