Medication Error Prevention

Human factors are the cognitive and environmental conditions that influence how people perform. Even experienced, competent nurses make errors when these factors are present. Understanding them allows for better system design and personal practice.

• Fatigue and workload — shifts exceeding 12 hours and high patient ratios significantly increase error rates. Fatigue impairs memory, attention, and decision-making.
• Interruptions — each interruption during medication preparation increases error risk. Nurses are interrupted an average of 6–9 times per hour during medication administration.
• Automation bias — over-relying on electronic systems (CPOE, BCMA alerts) without critical thinking. Clinicians can dismiss alerts reflexively or assume the system has caught every error.
• Confirmation bias — seeing what you expect to see. A nurse who expects a medication to be insulin may not notice the label reads a different concentration.
• Normalization of deviance — shortcuts that never caused harm previously become normalized, until they do cause harm. A culture of safety does not allow workarounds to become routine.

Communication breakdowns — between providers, pharmacists, and nurses — are a leading root cause in medication error analyses. They occur at every transition of care.

• Verbal orders — should be limited and must be read back to the prescriber. Verbal orders for chemotherapy and certain high-alert medications are prohibited at many facilities.
• Handoff communication — incomplete handoff is a major risk factor. SBAR (Situation, Background, Assessment, Recommendation) provides structure for accurate communication at transitions.
• Ambiguous orders — orders using trailing zeros (1.0 mg instead of 1 mg), naked decimal points (.5 mg instead of 0.5 mg), or dangerous abbreviations (U for units, QD for daily) increase transcription errors.
• Incomplete reconciliation — medication discrepancies at admission, transfer, or discharge are a common source of errors, particularly for home medications patients take routinely.

Documentation errors can directly cause patient harm — particularly when they result in a medication being given twice, not given at all, or given incorrectly by the next nurse.

• Pre-signing the MAR — documenting a dose before it is given. If the medication is then not given (patient refused, changed condition), the record falsely indicates administration.
• Late documentation — documenting long after administration makes accurate time recording difficult and may confuse subsequent nurses reviewing the record.
• Failure to document holds — a held dose must be documented with the reason; otherwise the next nurse may give it assuming it was missed.
• Copy-forward errors — in EHRs, copying medication lists from a prior visit can carry incorrect or discontinued medications forward.

Effective medication error prevention combines system-level safeguards with individual nursing habits.