High-Alert Medications: The ISMP List Every Tech Should Know

What Are High-Alert Medications?

High-alert medications are drugs that bear a heightened risk of causing significant patient harm when used in error. The Institute for Safe Medication Practices (ISMP) maintains a list of high-alert medications for various healthcare settings. While these drugs may not be the most error-prone, errors involving them are more likely to result in serious injury or death.

Common High-Alert Drug Classes

• Anticoagulants - Warfarin, heparin, enoxaparin, direct oral anticoagulants (DOACs)
• Insulin - All formulations and concentrations
• Opioids - Especially concentrated formulations, IV opioids, and methadone
• Chemotherapy agents - All cytotoxic drugs
• Neuromuscular blocking agents - Succinylcholine, rocuronium, vecuronium
• Concentrated electrolytes - IV potassium chloride, IV magnesium sulfate, hypertonic sodium chloride

Safety Strategies

Pharmacies implement multiple safeguards for high-alert medications:

• Independent double checks - A second person independently verifies the medication, dose, and patient before dispensing or administration
• Dose limits and alerts - Pharmacy systems flag doses that exceed established limits
• Standardized concentrations - Using consistent concentrations for IV medications reduces calculation errors
• Tall man lettering - Distinguishes look-alike drug names on labels and shelves
• Restricted access - Limiting who can access concentrated electrolytes and neuromuscular blockers

The Technician's Responsibility

Technicians must follow all high-alert medication protocols without shortcuts. If you notice a potential error involving a high-alert drug, speak up immediately. Even a minor dosing error with insulin or an anticoagulant can have life-threatening consequences.

High-alert medication questions are common on the PTCE. Review the ISMP list and practice identifying these drugs in PTCB exam simulations.