1.4 Drug Exposures
To map the source drug data to standard terms in the “Drug Exposure”
table of the CDM, the individual drug ingredient names in the source
table were manually matched with the “Concept Name” column in the
standardized vocabulary (RxNorm).
Some drugs were displayed in the source database as combination
products, with separate ingredients represented by their generic drug
names. For example, the concept of “Amoxicillin-Clavulanic Acid” did
not match directly with a standard drug concept (Figure 2). In this
case, the individual active pharmaceutical components of the drug
combination were traced back from the prescription order and mapped to
the RxNorm code “617296 (Amoxicillin 500 MG / Clavulanate 125 MG Oral
Tablet)”.