# New Animal Drugs; Withdrawal of Approval of New Animal Drug Applications; Diethylcarbamazine; Nicarbazin; Penicillin
> **Food and Drug Administration** · Final rule. · Published 2013-08-23 · Effective 2013-09-03 · 78 FR 52429
## Document
- **Document number:** 2013-20540
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 78 FR 52429
- **CFR reference:** 21 CFR 510
- **Publication date:** 2013-08-23
- **Effective date:** 2013-09-03
- **HHS docket:** Docket No. FDA-2013-N-0839
## Abstract

The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect the withdrawal of approval of three new animal drug applications (NADAs) at the sponsors' request because the products are no longer manufactured or marketed.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/08/23/2013-20540/new-animal-drugs-withdrawal-of-approval-of-new-animal-drug-applications-diethylcarbamazine)
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