# Implantation or Injectable Dosage Form New Animal Drugs; Ivermectin and Clorsulon
> **US Department of Health and Human Services** · Final rule. · Published 1997-03-26 · Effective 1997-03-26 · 62 FR 14301
## Document
- **Document number:** 97-7544
- **Category:** other
- **Sub-agency:** US Department of Health and Human Services
- **Federal Register citation:** 62 FR 14301
- **CFR reference:** 21 CFR 522
- **Publication date:** 1997-03-26
- **Effective date:** 1997-03-26
## 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 Merck Research Laboratories, Division of Merck & Co., Inc. The supplemental NADA provides for persistent control of gastrointestinal roundworms and lungworms following use of ivermectin and clorsulon injection for cattle.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1997/03/26/97-7544/implantation-or-injectable-dosage-form-new-animal-drugs-ivermectin-and-clorsulon)
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