RxNorm provides normalized names for clinical drugs and links its names to many of the drug vocabularies commonly used in pharmacy management and drug interaction software, including those of First Databank, Micromedex, MediSpan, Gold Standard Drug Database, and Multum. By providing links between these vocabularies, RxNorm can mediate messages between systems not using the same software and vocabulary.
This dataset associates attributes data with RXAtom_AUI_IDs and RXConcept_CUI_IDs. The corresponding drug names for these RXAtom_AUI_IDs and RXConcept_CUI_IDs are found in “RxNorm Drugs Names and Identifiers” dataset.
A base atom can be identified by the existence of an attribute, where the Attribute_Name_ATN=’AMBIGUITY_FLAG’ and the Attribute_Value_ATV=’Base’. Similarly, the duplicate atoms are identified with Attribute_Name_ATN =’AMBIGUITY_FLAG’ and Attribute_Value_ATV =’Duplicate’. This attribute will carry the Source_Abbreviation=RXNORM.
The quantity factor is stored as an attribute as the value of the Attribute_Name_ATN =’RXN_QUANTITY’ with Source_Abbreviation=RXNORM. This quantity factor consists of a number followed by a unit measure. The number might represent a strength, a unit of time, or a quantity of dosages depending upon the drug’s dosage form in use at the time.