Anatomical Therapeutic Chemical (ATC) Codes (from UMLS)

Homepage URL: nlm.nih.gov/research/umls/sourcereleasedocs/current/ATC/index.html

Description: ATC classifies drugs at five different levels. Each level is a different grouping of drugs. Groupings of active substances include the organ or system on which the drug acts as well as therapeutic, pharmacological, and chemical properties of the drug.

Example edge: N/A