What makes a medication high-alert
High-alert medications are not necessarily involved in more errors, but when an error happens the harm is more likely to be severe. ISMP publishes lists for acute care, community and long-term care settings. Your facility's list is the one that applies to you.
Groups on the ISMP acute care list (examples)
| Group | Examples | Main danger |
|---|---|---|
| Insulin (all forms) | Regular, lispro, glargine, U-500 | Hypoglycemia; concentration and syringe errors |
| Opioids (IV, transdermal, oral) | Morphine, hydromorphone, fentanyl | Respiratory depression |
| Anticoagulants | Heparin, enoxaparin, warfarin, apixaban | Bleeding |
| Concentrated electrolytes | Potassium chloride concentrate, hypertonic saline above 0.9%, magnesium sulfate injection | Cardiac arrest, overcorrection |
| Adrenergic agonists and antagonists (IV) | Epinephrine, norepinephrine, esmolol | Hypertension or hypotension, dysrhythmias |
| Sedation agents (IV moderate sedation; oral sedation for children) | Midazolam, dexmedetomidine; general anesthetics such as propofol are listed separately | Respiratory depression |
| Neuromuscular blocking agents | Rocuronium, vecuronium, succinylcholine | Paralysis and respiratory arrest |
| Chemotherapy | Oral and parenteral antineoplastics | Severe toxicity; weekly methotrexate given daily by mistake |
| Oxytocin (IV) | Pitocin | Uterine tachysystole, fetal distress |
| Epidural and intrathecal medications | Local anesthetics, opioids | Wrong-route errors |
| Sulfonylurea hypoglycemics (oral) | Glipizide, glyburide | Prolonged hypoglycemia |
| Parenteral nutrition | Dextrose 20% or more, lipids | Hyperglycemia, infection, line errors |
Safety practices
- Independent double checks by a second nurse when policy requires them (insulin infusions, heparin, chemotherapy, pediatric doses).
- Smart infusion pumps with drug libraries; never bypass the library.
- Standard concentrations and premixed bags.
- Separate storage and warning labels; concentrated potassium is not stocked on patient units.
- Tall-man lettering for look-alike names (hydrOXYzine and hydrALAZINE).
- Confirm the patient's weight in kg for weight-based doses.
- Know the antidote and where it is stored.
Frequently asked questions
Which medications are considered high-alert?
ISMP lists groups such as insulin, opioids, anticoagulants, concentrated electrolytes, IV adrenergic drugs, sedation agents, neuromuscular blockers, chemotherapy and IV oxytocin. Each facility keeps its own list.
Why is potassium chloride a high-alert medication?
Concentrated or rapidly infused potassium can cause fatal cardiac arrest. It is never given IV push or IM and is infused diluted by pump.