Local Anesthesia Practice Exam 2025 – Complete Study Guide for StudentRDH

Question: 1 / 400

Which local anesthetic is known for having the shortest duration of action?

Bupivacaine

Mepivacaine

Lidocaine

Lidocaine is known for having the shortest duration of action among the local anesthetics listed. Its typical duration ranges from approximately 60 to 120 minutes, making it ideal for procedures where a shorter anesthetic effect is required. The relatively rapid onset and shorter duration of lidocaine are advantageous in many clinical situations, such as in outpatient procedures or where patients may require a quicker recovery.

In comparison, bupivacaine has a significantly longer duration of action, often lasting several hours, which makes it more suitable for extended procedures or postoperative pain management. Mepivacaine also provides a medium duration of action, somewhat longer than lidocaine, while prilocaine generally has a duration that can be similar to or slightly longer than lidocaine, depending on the specific formulation and usage.

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Prilocaine

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