Are a medication error and an adverse drug event (ADE) the same thing?

Are a medication error and an adverse drug event (ADE) the same thing?

• A. They are the same concept.
• B. A medication error is a preventable mistake in prescribing, dispensing, or administering; an ADE is harm caused by a drug. They are not the same.
• C. An ADE is preventable; a medication error is harm caused by a drug.
• D. A medication error is never preventable.

Answer: (B)

Understanding this distinction helps prioritize safety in the medication-use process. A medication error is a preventable mistake that can occur at prescribing, dispensing, or administering a drug. An adverse drug event (ADE) is harm caused by the drug itself. They are not the same because the error focuses on a mistake in the process that could be avoided, while the ADE focuses on the injury from the drug, which can happen even without an error. Not all ADEs come from errors—some are predictable side effects or reactions despite correct use—and not every medication error results in harm. This relationship means preventing medication errors can reduce some ADEs, but ADEs can still occur even when care is appropriate.

Understanding this distinction helps prioritize safety in the medication-use process. A medication error is a preventable mistake that can occur at prescribing, dispensing, or administering a drug. An adverse drug event (ADE) is harm caused by the drug itself. They are not the same because the error focuses on a mistake in the process that could be avoided, while the ADE focuses on the injury from the drug, which can happen even without an error. Not all ADEs come from errors—some are predictable side effects or reactions despite correct use—and not every medication error results in harm. This relationship means preventing medication errors can reduce some ADEs, but ADEs can still occur even when care is appropriate.