March 2018 MED-RT (version name 2018.03.05)

The Medication Reference Terminology (MED-RT) is the evolutionary successor to the Veterans Health Administration National Drug File – Reference Terminology (VHA NDF-RT™). Both are formal ontological representations of medication terminology, pharmacologic classifications, and asserted authoritative relationships between them. Distribution of MED-RT is through the same channels on the same monthly schedule as its predecessor NDF-RT, in XML and other formats. 

Content in this version of MED-RT represents revisions based on data in the following sources and updated using the FDA SPL file dated 2/5/18:
	NDF-RT (2018.02.05.17AB)
	RxNorm (2018.02.05.17AB)
	MeSH (2017_2017.09.19)
	SNOMED CT US Edition (2017.09.17AA)

TOTAL CONCEPTS IN CURRENT VERSION (2018.03.05): 3267
	EPC concepts: 627	
	MoA concepts: 631
	PE concepts:  1866
	PK concepts:  59
	TC concepts:  30
	EXT concepts: 24
	HC concepts:  30

There were 5 new concepts manually added for this release including 2 added to Established Pharmacologic Classes and 3 added to the Mechanism of Action hierarchy.