# Ophthalmic and Topical Dosage Form New Animal Drugs; Doramectin
> **Food and Drug Administration** · Final rule. · Published 1999-09-10 · Effective 1999-09-10 · 64 FR 49082
## Document
- **Document number:** 99-23466
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 64 FR 49082
- **CFR reference:** 21 CFR 524
- **Publication date:** 1999-09-10
- **Effective date:** 1999-09-10
## Abstract

The Food and Drug Administration (FDA) is amending the animal drug regulations to reflect approval of a supplemental new animal drug application (NADA) filed by Pfizer, Inc. The supplemental NADA provides for further use of doramectin in cattle for treatment and control of the gastrointestinal roundworm Trichostrongylus axei L4 and for control of and protection from reinfection with Haemonchus placei for 35 days after treatment.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/09/10/99-23466/ophthalmic-and-topical-dosage-form-new-animal-drugs-doramectin)
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