Geriatric patients have reduced anesthetic requirements to about ________ of the healthy animal dose.

Geriatric patients have reduced anesthetic requirements to about ________ of the healthy animal dose.

• A. 3/4
• B. 1/2 - 1/4
• C. 1/3
• D. 2/3

Answer: (B)

Elderly patients require lower doses of anesthetics because aging changes pharmacokinetics and pharmacodynamics, making them more sensitive and slower to clear drugs. In practice, the anesthetic needs are reduced to about half to a quarter of a healthy young adult dose, reflecting the combination of increased CNS sensitivity and decreased organ function that affects distribution, metabolism, and excretion. That range captures the typical reductions seen with many anesthetic agents. Using a dose as high as three-quarters of the young adult dose would be excessive for most geriatrics, and requiring only one-third or two-thirds of the dose usually underestimates the needed reduction for many patients. So the best answer is the half-to-quarter range.

Elderly patients require lower doses of anesthetics because aging changes pharmacokinetics and pharmacodynamics, making them more sensitive and slower to clear drugs. In practice, the anesthetic needs are reduced to about half to a quarter of a healthy young adult dose, reflecting the combination of increased CNS sensitivity and decreased organ function that affects distribution, metabolism, and excretion.

That range captures the typical reductions seen with many anesthetic agents. Using a dose as high as three-quarters of the young adult dose would be excessive for most geriatrics, and requiring only one-third or two-thirds of the dose usually underestimates the needed reduction for many patients. So the best answer is the half-to-quarter range.