# Phlebotomy Exam Prep 37, Therapeutic Drug Monitoring — Peak vs Trough

Page: https://stenobird.com/podcast/nursing-healthcare-exam-prep-7652377/phlebotomy-exam-prep-37-therapeutic-drug-monitoring-peak-vs-trough
Text version: https://stenobird.com/podcast/nursing-healthcare-exam-prep-7652377/phlebotomy-exam-prep-37-therapeutic-drug-monitoring-peak-vs-trough.md
Podcast: [Nursing & Healthcare Exam Prep](https://stenobird.com/podcast/nursing-healthcare-exam-prep-7652377)
Published: 2026-06-03T22:25:11+00:00
Episode link: https://open-exam-prep.com/
Audio file: https://episodes.captivate.fm/episode/37f6db1c-f003-41c6-91d1-2013d51fa368.mp3
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Duration seconds: 188

## Resource

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - The critical difference between trough (lowest drug concentration) and peak (highest drug concentration) levels. - Why precise timing is the most tested concept for therapeutic drug monitoring on the Phlebotomy exam. - How to correctly time a trough draw, which is always immediately before the next scheduled dose. - How to correctly time a peak draw for IV medications like vancomycin, which is 1-2 hours after the infusion is complete. - A simple mnemonic to remember the difference: "Trough is low, just before the go. Peak is high, after it's all inside." For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep

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## Transcript

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