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# FDA Withdrawing Elanco’s Sulfamethazine
- URL: https://www.fdaweb.com/fda-withdrawing-elancos-sulfamethazine/
- Published: 2022-02-28T12:00:00.000Z
- Updated: 2026-09-14T17:34:31.000Z
- Author: David McFarland
- Tags: FDA Policy/General, #legacy-id-D5151250

*Federal Register* notice: FDA is withdrawing approval of an Elanco new animal drug application (NADA 093–329) for use of a prolonged-release bolus containing sulfamethazine in cattle because the product is no longer manufactured or marketed. The sponsor requested the action because the product is no longer manufactured or marketed. To view the notice, click [here](https://www.govinfo.gov/content/pkg/FR-2022-02-28/pdf/2022-03539.pdf?ref=fdaweb.com).