The Unique Ingredient Identifier (UNII) is a non-proprietary, free, unique, unambiguous, nonsemantic, alphanumeric identifier based on a substance molecular structure and/or descriptive information.
The UNII is:
– One of the core components of the United States Federal Medication Terminology.
– Used in the FDA’s Structured Product Labeling
– Used to assist in the generation of the National Library of Medicine’s (NLM’s) RxNorm.
– A US government standard for drug ingredient and food allergen identifiers
– A component of the Environmental Protection Agency’s Substance Registry System (future)
The UNII may be found in:
– NLM’s Unified Medical Language System (UMLS)
– National Cancer Institutes Enterprise Vocabulary Service
– USP Dictionary of USAN and International Drug Names (future)
– FDA Data Standards Council website
– VA National Drug File Reference Terminology (NDF-RT)
– FDA Inactive Ingredient Query Application
The present data set indicates the name used for each UNII and the type of name selected, either preferred name, systematic name, synonym, code or brand name.