Detecting and Managing Adverse Drug Reactions
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An adverse drug reaction (ADR) is any unexpected, undesired, or excessive response to a medication that results in:
- temporary or permanent serious harm or disability
- admission to a hospital, transfer to a higher level of care, or prolonged stay
Adverse drug reactions are distinguished from adverse drug events, in which causality is uncertain, and side effects, which may be bothersome to the patient and necessitate a change in therapy but are not considered serious. Although some ADRs are the result of medication errors, many are not.