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Malignant Hyperthermia — NCLEX Cheat Sheet

Antidote = dantrolene STAT
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👤 By the CinnaRN Clinical Content Team 🕐 Updated 2026-07-11 🏷️ Reduction of Risk Potential 🔖 Free to read, print, and share
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Use this quick-reference guide to spot, treat, and prevent Malignant Hyperthermia on the NCLEX. Keep it handy during review and on exam day!

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Cause

Why it happens
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Signs

What to look for
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Do

Nursing actions
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Report

Notify / act now
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Quick Tip

The earliest signs are a rising end-tidal CO2 and masseter (jaw) muscle rigidity after anesthesia induction; temperature elevation is a late sign.

📖 Related Topics

Increased Intracranial PressureDeep Vein Thrombosis PreventionTesticular TorsionDiabetic Nephropathy
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