The Veterans Health Administration (VHA) produces the Medication Reference Terminology (MED-RT). The VHA is a division of the U.S. Department of Veteran Affairs.
MED-RT is a replacement and successor to NDF-RT. Both terminologies are formal ontological representations of medication terminology, pharmacologic classifications, and asserted authoritative relationships between them.
MED-RT includes native pharmacologic classification concepts (e.g. mechanisms of action (MoA), physiologic effects (PE), Established Pharmacologic Class (EPC)) and all relationships asserted between concepts in any namespace.
MED-RT incorporates the following terminologies:
MED-RT will maintain the pharmacologic classification relationships from NDF-RT.
It also maintains the National Committee on Vital and Health Statistics (NCVHS) standards for describing medication pharmacologic classification: MoA and PE hierarchy concepts. The concepts are components of the Federal Medication Terminologies (FMT) interagency collaboration.
MED-RT is updated monthly.
Metathesaurus Update Frequency
MED-RT is updated in each release.