What is the maximum recommended dose of lidocaine for a healthy adult?

• A. 2 mg/kg
• B. 5 mg/kg without epinephrine
• C. 10 mg/kg
• D. 3 mg/kg with epinephrine

Answer: (B)

The maximum recommended dose of lidocaine for a healthy adult without epinephrine is indeed 5 mg/kg. This dosage is established based on safety and efficacy to minimize the risk of systemic toxicity while ensuring adequate anesthesia for the procedure.

Lidocaine is a commonly used local anesthetic that, when administered above the recommended dose, can lead to serious adverse effects, including central nervous system or cardiovascular complications. The inclusion of epinephrine typically allows for a higher maximum dose of lidocaine because epinephrine causes vasoconstriction, which decreases the rate of systemic absorption of the anesthetic, therefore reducing the risk of toxicity. However, in this specific question, the focus is on the dosage of lidocaine without epinephrine.

Understanding these dosage parameters is essential for safe practice in local anesthesia, ensuring that patients receive effective pain control while minimizing any potential risks associated with the anesthetic agent.