Home › Cheat Sheets › Pharmacological Therapies

Ondansetron — NCLEX Cheat Sheet

5-HT3 blocker → watch QT prolong
🔖 Save
👤 By the CinnaRN Clinical Content Team 🕐 Updated 2026-07-11 🏷️ Pharmacological Therapies 🔖 Free to read, print, and share
💡

Use this quick-reference guide to spot, treat, and prevent Ondansetron on the NCLEX. Keep it handy during review and on exam day!

🩺
📌

Uses

Key facts
🩺

Signs

What to look for
🚩

Report

Notify / act now
🧪

Labs

Key numbers
✨

Quick Tip

Prevents and treats nausea/vomiting by blocking 5-HT3 serotonin receptors.

📖 Related Topics

Digoxin ToxicityHeparin TherapyWarfarin TherapyAcetaminophen Poisoning in Children
Was this helpful? ✎ Suggest an edit

Master Ondansetron with practice, not just reading

4,700+ NCLEX-style questions with rationales, 51 interactive NGN cases, and an AI tutor — free every day, no card needed.

Practice Pharmacological Therapies questions free →

Related Pharmacological Therapies cheat sheets

Digoxin ToxicityDig level > 2.0 ng/mL Heparin TherapyMonitor aPTT, antidote protamine Warfarin TherapyMonitor INR, antidote vit K Acetaminophen Poisoning in ChildrenAntidote = N-acetylcysteine Serotonin SyndromeToo much serotonin = hyperthermia Neuroleptic Malignant SyndromeAntipsychotic emergency: lead-pipe rigidity Tardive DyskinesiaLate involuntary movements, often irreversible Lithium ToxicityToxic > 1.5 mEq/L