UNII+Codes

UNII codes provide unique identifiers for ingredients. See UNII Codes Questions and Answers for answers to some commonly raised questions.

(provided by the SRS group at FDA)

Example:
 * AMPHOTERICIN B** has a UNII code of **7XU7A7DROE.**

For SPL, they appear as part of the  coding:

  **prochlorperazine maleate**    **prochlorperazine**   

These codes are assigned by

The FDA posts updates to the [|UNII code list] on the [|Data Council Standards] page. These updates show up frequently -- check back often.

Searchable UNIIs Database
Website to search a web-based database for unique ingredient identifiers (UNIIs): http://fdasis.nlm.nih.gov .

Other Locations for UNIIs

 * Inactive Ingredients look-up: []
 * The UNII has been adopted by the United States Consolidated Health Informatics initiative http://www.hhs.gov/healthit/chiinitiative.html; http://www.hhs.gov/healthit/documents/chiinitiative/med_ingred_full_public.pdf
 * The UNII is recommended by the National Committee on Vital and Health Statistics http://ncvhs.hhs.gov/031105lt2.pdf at page 8
 * UNIIs have been incorporated into the VA's National Drug File Reference Terminology (NDF-RT), which in turn is available through NLM's Unified Medical Language System (UMLS) http://www.nlm.nih.gov/research/umls/metab2.html.
 * UNIIs have been incorporated into the National Cancer Institutes Enterprise Vocabulary Service http://www.cancer.gov/cancertopics/terminologyresources/page5
 * UNIIs will be incorporated into the electronic version of the 2007 edition of the USP Dictionary of USAN and International Drug Names [|http:// www.usp.org/products/dictionary/], as well as subsequent printed versions.
 * UNIIs will be assigned to each substance that is in the Environmental Protection Agency's Substance Registry System http://www.epa.gov/srs/index.htm.

Substance Registration System (SRS)
[|SRS User Guide]