RN Exam Practice
Pharmacological and Parenteral TherapiesQuestion 1731 of 2368

A client is receiving an IV antibiotic that requires trough monitoring. When is the trough level drawn?

  1. Immediately after the dose is administered
  2. Halfway between two scheduled doses
  3. At the time the drug is at its highest level
  4. Right before the next scheduled dose is given
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Correct answer: Right before the next scheduled dose is given

A trough level is drawn when the drug is at its lowest, right before the next scheduled dose. A peak is the highest level after administration.

Source: Nursing Pharmacology, 2nd edition (Open RN, Chippewa Valley Technical College, 2023), Pharmacokinetics & Pharmacodynamics: Peak and Trough Levels. Licensed under CC BY 4.0.

Practice the topic "Pharmacological and Parenteral Therapies"

Questions last reviewed: 18 October 2026