Drug prescriptions need to accurately identify the medications that prescribers intend for pharmacists to dispense. However, the set of computer-interpretable identifiers currently used in electronic prescribing (e-prescribing) does not support the specific needs of the prescribers and pharmacists who conduct e-prescribing transactions. RxNorm, a drug nomenclature from the National Library of Medicine, assigns a rigorously derived, centrally maintained, and publicly available unique identifier to each clinically distinct drug.
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