High-Alert Medications on the NCLEX
The med safety list every NCLEX candidate must know: insulin, heparin, opioids, KCl, mag sulfate, chemo, anticoagulants.
ISMP defines high-alert meds as those with heightened risk of significant harm. NCLEX tests these heavily.
Why high-alert
Narrow therapeutic index, frequent dosing errors, serious consequences. Examples: insulin overdose → severe hypoglycemia; heparin overdose → bleeding; KCl push → cardiac arrest.
Must-know list
Insulin (correct type, dose, route). Heparin/anticoagulants (aPTT, INR). Opioids (RR, sedation). KCl (never push, always dilute). Magnesium sulfate (OB monitoring). Chemo (extravasation, neutropenia). Concentrated electrolytes. Neuromuscular blockers. Insulin pumps and PCA pumps.
Safety practices
Independent double-check by two RNs. Use of smart pumps with dose limits. Standardized concentrations. Avoid trailing zeros (1 mg, not 1.0 mg). Tall-man lettering (heparin vs Hespan).
Common errors NCLEX tests
Insulin in U-100 syringe vs tuberculin. Heparin units vs mL. KCl push (never). Misread orders ('q4h' vs 'q4', the latter is incorrect).
Frequently asked
PCA-by-proxy, what is it?
Family member pushes the button. Sentinel event. Counsel family explicitly.
Two-nurse verification, when required?
Per facility policy. Common: insulin, heparin drips, opioid drips, chemo, blood products.
Quick check
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