Can label wording cause medication errors?

Yes. The FDA treats look-alike container labels and confusing prescribing information as things that can cause or lead to medication errors, and it has a team that reviews labels for exactly that risk. The patient-safety group ISMP keeps a list of abbreviations, symbols and dose designations that have been misinterpreted and involved in harmful or potentially harmful medication errors. A correctly spelled wrong word belongs to the same family: the text looks fine, and the reader acts on the wrong meaning.

What counts as a medication error

The FDA uses the NCC MERP definition: any preventable event that may cause or lead to inappropriate medication use or patient harm while the medication is in the control of a healthcare provider, patient or consumer. Harm doesn't have to happen. An error can occur with no adverse event at all.

The FDA's own example of a preventable event is a patient getting the wrong drug because two container labels look alike. Wording works the same way. If the words point the reader somewhere wrong, the error was preventable at the label.

Where the FDA looks for wording risk

The FDA's medication-error team reviews proposed container labels, carton labeling and prescribing information, including Medication Guides and Instructions for Use, before approval. After approval it watches error reports and can revise labeling or issue a safety communication when wording keeps causing trouble. The FDA also asks people to report confusing prescribing information or look-alike labels.

For prescription drug and biologic sponsors, the FDA has a guidance on container label and carton labeling design to cut medication errors. It sets out principles and recommendations so the critical elements of a container label and carton labeling promote safe dispensing, administration, and use of the product.

What ISMP adds

ISMP's list names abbreviations, symbols and dose designations that have been misinterpreted in reported errors, and says they should not be used, including on computer-generated medication labels. The lesson for label teams: short, familiar-looking marks are where misreading happens.

Where a wrong word fits

Abbreviation lists and design rules target text that is ambiguous. A contextual word error is different. The word is real, spelled right, and wrong for the line, so it can change a direction or a warning without looking odd. A few human-verified cases:

• A direction verb went wrong. lake→take
• A named risk went missing. attach→attack
• A first-aid step broke. doctor→water

See every case on the case index.

What a label team can do

• Read each warning and direction for sense, as the patient would act on it.
• Name the key word on every high-stakes line in your checklist.
• Check abbreviations against the ISMP list.
• Fix the template, not only the one label, when a wrong word turns up.

For what to do once one is live, see found a wrong word on a released label.

Sources

• FDA: Medication Errors Related to CDER-Regulated Drug Products
• FDA: Safety Considerations for Container Labels and Carton Labeling Design to Minimize Medication Errors
• List of Error-Prone Abbreviations
• ISMP List of Error-Prone Abbreviations, Symbols, and Dose Designations (PDF)

Last reviewed: October 14, 2026

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Can a typo on a drug label lead to a medication error?

It can, if it changes what the reader does. The FDA names look-alike container labels and confusing prescribing information as things that can cause or lead to medication errors, and an error counts even when no harm follows.

What is a medication error according to the FDA?

The FDA uses the NCC MERP definition: any preventable event that may cause or lead to inappropriate medication use or patient harm while the medication is in the control of a healthcare provider, patient or consumer.

What is the ISMP list of error-prone abbreviations?

An ISMP list of abbreviations, symbols and dose designations that have been misinterpreted and involved in reported harmful or potentially harmful medication errors. ISMP says they should not be used, including on handwritten and computer-generated medication labels.

Does the FDA review label wording for medication error risk?

Yes. The FDA's medication error team reviews proposed container labels, carton labeling and prescribing information before approval, and monitors error reports after approval.