Which local anesthetic is commonly used for infiltration anesthesia?

Lidocaine is widely recognized as a primary choice for infiltration anesthesia due to its rapid onset and moderate duration of action. It works by blocking sodium channels, which prevents the transmission of pain signals along nerve fibers. This effectiveness makes lidocaine particularly suitable for procedures that require immediate pain relief in specific areas, such as minor surgeries or dermatological procedures.

Lidocaine's versatility extends beyond infiltration; it can also be used for nerve blocks and epidurals, enhancing its utility in varied clinical settings. Its relatively low systemic toxicity compared to some other local anesthetics allows for safe administration in many situations. Additionally, its availability in various formulations, including plain and with epinephrine, further augments its use in infiltration techniques.

In comparison, while other options like bupivacaine and ropivacaine are effective local anesthetics, they are typically favored for longer procedures due to their prolonged duration of action. Procaine, while historically significant, has largely fallen out of favor in modern practice. Therefore, lidocaine remains the most common local anesthetic specifically utilized for infiltration anesthesia, cementing its role as a staple in this domain.