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Actual Adverse Drug Event An event in the medication use process that reached the patient and caused injury or potential injury (e.g., a medication error, or an adverse drug reaction).
Adverse drug reaction (ADR) An unintended physical reaction to a drug used in the approved manner. An allergic reaction (immunologic hypersensitivity, occurring as the result of unusual sensitivity to a drug) and an idiosyncratic reaction (abnormal susceptibility to a drug that is peculiar to the individual) are also considered ADR’s. For the purpose of this policy, side effects (expected, well-known reactions resulting in little or no change in patient management) are not included in this definition.
Medication Error Any preventable event that may cause or lead to inappropriate medication use or patient harm while the medication is in the control of the health care professional, patient, or consumer. Such events may be related to professional practice, health care products, procedures, or systems (e.g., prescribing; order communication; product labeling, packaging, and nomenclature; compounding; dispensing; distribution; administration; education; monitoring; and use).
Medication use process The cycle of medication management which includes ordering, dispensing, administering, and monitoring medication use, as well as all the systems that support these processes.
Potential Adverse Drug Event An error in the medication use process that if it had reached the patient, could have caused injury.
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