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# Guide on Drug Supply Security Product Identifiers
- URL: https://www.fdaweb.com/guide-on-drug-supply-security-product-identifiers/
- Published: 2021-06-04T12:00:00.000Z
- Updated: 2026-09-14T17:01:55.000Z
- Author: David McFarland
- Tags: FDA Policy/General, #legacy-id-D5149467

*Federal Register* notice: FDA is making available a final guidance entitled *Product Identifiers Under the Drug Supply Chain Security Act: Questions and Answers*. The document is intended to address questions about product identifiers that are required to be affixed to, or imprinted on, packages and homogenous cases of certain drug products. It also clarifies FDA’s interpretation of the requirements, such as how they relate to linear barcode requirements. To view the notice, click [here](https://www.govinfo.gov/content/pkg/FR-2021-06-04/pdf/2021-11733.pdf?ref=fdaweb.com).