[2] Created in 1968 and regularly updated, since 2005 there have been major developments in the form of a WHO Drug Dictionary Enhanced (with considerably more fields and data entries) and a WHO Herbal Dictionary, which covers traditional and herbal medicines.
It uniquely identifies active moieties, regardless of salt form or plant part and extract.
WHODrug records sharing the same Drug Rec No and Seq1 contain the same variation/plant part/extract variation of the same active moiety.
The Drug Code for the trade name Advil infants pain & fever relief is 001092 01 A3D.
WHODrug records are classified with at least one code from Anatomical Therapeutic Chemical Classification System (including the HATC which stands for Herbal ATC and which is treated as part of ATC for mapping purposes).
In this additional reference, WHODrug records are matched to fifth level ATC codes where applicable.