Reduction of Risk PotentialQuestion 563 of 2368

A client takes phenobarbital as an anticonvulsant. Which serum level is within the therapeutic range?

  1. 8 mcg/mL
  2. 45 mcg/mL
  3. 60 mcg/mL
  4. 25 mcg/mL
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Correct answer: 25 mcg/mL

The therapeutic range for phenobarbital as an anticonvulsant is 15 to 40 mcg/mL.

Source: Nursing Pharmacology, 2nd edition (Open RN, Chippewa Valley Technical College, 2023), Central Nervous System: Barbiturates. Licensed under CC BY 4.0.

Practice the topic "Reduction of Risk Potential"

Questions last reviewed: 18 October 2026