What is the solution that was added to the cartridge of local anesthetic to prevent bacterial growth?
A) Vasoconstrictor preservative
B) Sodium hydroxide
C) Sodium chloride
D) Methylparaben

Question

Quizplus · Accepted Answer

Methylparaben is a common preservative added to local anesthetics to prevent bacterial growth. It is effective against a wide range of bacteria and fungi, and has been found to be safe for use in dental local anesthetics. A vasoconstrictor preservative (such as epinephrine) may also be added for its ability to constrict blood vessels and prolong the anesthetic effect, but is not specifically added for its preservative properties. Sodium hydroxide and sodium chloride are not used as preservatives in local anesthetics.

What Is the Solution That Was Added to the Cartridge