What is the primary rationale for caution with amide local anesthetics in patients with liver disease?

What is the primary rationale for caution with amide local anesthetics in patients with liver disease?

• A. Amides are metabolized in the liver
• B. Amides are excreted via kidneys
• C. Amides are destroyed in the stomach
• D. Amides cause immune reactions

Answer: (A)

Amide local anesthetics are metabolized in the liver, so liver disease can slow their metabolism and clearance. When hepatic function is impaired, plasma levels rise and the duration of anesthesia lengthens, increasing the risk of systemic toxicity such as CNS or cardiovascular effects. Therefore, caution is needed with dosing and choice of agent in patients with liver disease. The other points aren’t the primary concern: amides aren’t destroyed in the stomach, are not chiefly excreted unchanged by the kidneys, and immune reactions aren’t the main issue in this context.

Amide local anesthetics are metabolized in the liver, so liver disease can slow their metabolism and clearance. When hepatic function is impaired, plasma levels rise and the duration of anesthesia lengthens, increasing the risk of systemic toxicity such as CNS or cardiovascular effects. Therefore, caution is needed with dosing and choice of agent in patients with liver disease. The other points aren’t the primary concern: amides aren’t destroyed in the stomach, are not chiefly excreted unchanged by the kidneys, and immune reactions aren’t the main issue in this context.