The National Drug File - Reference Terminology (NDFRT) - Food and Drug Administration Structured Product Labeling (FDASPL) relationships were developed by the FDA using the NDFRT drug classes and the active moieties from the FDA structured product labels submitted to the FDA by drug manufacturers. The Veterans Health Administration (VHA) maintains the NDFRT-FDASPL relationships within NDFRT.
NDFRT-FDASPL relationships are used to associated NDFRT ingredients with NDFRT drug classes.
NDFRT-FDASPL is a set of relationships between NDFRT concepts. No source atoms are included.
NDFRT-FDASPL is updated monthly.
Metathesaurus Update Frequency
NDFRT-FDASPL is updated in each Metathesaurus release as part of RxNorm.