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Posted: October 19, 2017

Searching by Unique Ingredient Identifier Now Available

Users can now search DailyMed by unique ingredient identifier (UNII) for an active ingredient and an active moiety. Instead of relying on drug or chemical names, which vary across countries and regions, searching by UNII allows DailyMed to retrieve drug product records by ingredient using a common global identifier.

A UNII is a globally used, non-proprietary, free, unique, unambiguous, non-semantic, alphanumeric identifier based on a substance’s molecular structure and/or descriptive information. The joint Food and Drug Administration (FDA)/ United States Pharmacopeia (USP) Substance Registration System (SRS) assigns a UNII to a substance when enough information is collected.

To illustrate, a common active ingredient in anti-allergy medications is diphenhydramine hydrochloride with UNII TC2D6JAD40. Searching "TC2D6JAD40" in DailyMed retrieves over 1500 drug product records. Diphenhydramine with UNII 8GTS82S83M is the active moiety of diphenhydramine hydrochloride. Searching "8GTS82S83M" retrieves over 1600 records as of Oct 2017.

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About DailyMed

DailyMed provides trustworthy information about marketed drugs in the United States. DailyMed is the official provider of FDA label information (package inserts). This Web site provides a standard, comprehensive, up-to-date, look-up and download resource of medication content and labeling found in medication package inserts.

The National Library of Medicine (NLM) provides this as a public service and does not accept advertisements. The drug labeling information on this Web site is the most recent submitted to the Food and Drug Administration (FDA) and currently in use; it may include, for example, strengthened warnings undergoing FDA review or minor editorial changes. These labels have been reformatted to make them easier to read.