Source:http://linkedlifedata.com/resource/umls/id/C0559546
HL7V3.0: <p>Indicates that the observation is of an unexpected negative occurrence in the subject suspected to result from the subject's exposure to one or more agents. Observation values would be the symptom resulting from the reaction.</p>,NCI: An unexpected medical problem that happens during treatment with a drug or other therapy. Adverse effects do not have to be caused by the drug or therapy, and they may be mild, moderate, or severe.,NCI: Any noxious and unintended response(s) to a medical product or procedure, for which a causal relationship with this product or procedure is at least a reasonable possibility i.e., the relationship cannot be ruled out.