# 2026-12682: FDA Issues New Rules for Testing Horse Worm Medicine

2026-12682, International Cooperation on Harmonisation of Technical Requirements for Registration of Veterinary Medicinal Products; Effectiveness of Anthelmintics: Specific Recommendations for Equines; Guidance for Industry; Availability, is a Federal Register notice from Health and Human Services Department, Food and Drug Administration published 2026-06-24, effective 2026-06-24 (as of 2026-07-01).

- Canonical: https://policyrisk.com/federal-register/2026-12682
- As of: 2026-07-01
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-12682
- Title: International Cooperation on Harmonisation of Technical Requirements for Registration of Veterinary Medicinal Products; Effectiveness of Anthelmintics: Specific Recommendations for Equines; Guidance for Industry; Availability
- Type: Notice
- Agencies: Health and Human Services Department; Food and Drug Administration
- Citation: 91 FR 37985
- Published: 2026-06-24
- Effective: 2026-06-24
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: none
- Last updated: 2026-07-01

## In one line

FDA Issues New Rules for Testing Horse Worm Medicine

## Summary

The FDA just released new guidance to help companies test worm-killing medicines for horses. This makes it easier for drug makers worldwide to prove their products work, speeding up approvals and keeping horses healthy. If you’re in the veterinary or animal medicine world, this update is your new go-to starting June 24, 2026.

## Abstract

The Food and Drug Administration (FDA or Agency) is announcing the availability of a final guidance for industry (GFI) #109 entitled "Effectiveness of Anthelmintics: Specific Recommendations for Equines." This guidance has been developed for veterinary use by the International Cooperation on Harmonisation of Technical Requirements for Registration of Veterinary Medicinal Products (VICH). The objective of this guidance is to provide study design recommendations specific to equines that will facilitate the universal acceptance of the generated effectiveness data to fulfill the national/regional requirements for anthelmintic drugs in animal species.

## Effects PRIA read

No economic effects identified for this document.

## Related documents

- [2026-16296](https://policyrisk.com/federal-register/2026-16296): Substances Generally Recognized as Safe, 2026-08-11
- [2026-14073](https://policyrisk.com/federal-register/2026-14073): Drug Establishment Registration and Drug Listing Requirements for Establishments Engaged in Distributed Manufacturing and Certain Foreign E…, 2026-07-13
- [2026-13047](https://policyrisk.com/federal-register/2026-13047): Establishment Registration and Product Listing for Tobacco Products, 2026-06-29
- [2025-04978](https://policyrisk.com/federal-register/2025-04978): Nonprescription Drug Product With an Additional Condition for Nonprescription Use, 2025-03-25
- [2025-01840](https://policyrisk.com/federal-register/2025-01840): Nonprescription Drug Product With an Additional Condition for Nonprescription Use, 2025-01-27
- [2026-20727](https://policyrisk.com/federal-register/2026-20727): Medical Devices; Immunology and Microbiology Devices; Classification of the System for Detection of Nucleic Acid From Non-Viral Microorgani…, 2026-10-09

## Sources
- [2026-12682 on federalregister.gov](https://www.federalregister.gov/documents/2026/06/24/2026-12682/international-cooperation-on-harmonisation-of-technical-requirements-for-registration-of-veterinary)
- [2026-12682 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-06-24/pdf/2026-12682.pdf)

## Related
- [Previous: 2026-12681, International Cooperation on Harmonisation of Technical Requirements for Regist…](https://policyrisk.com/federal-register/2026-12681)
- [Next: 2026-12683, International Cooperation on Harmonisation of Technical Requirements for Regist…](https://policyrisk.com/federal-register/2026-12683)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-12682 (as of 2026-07-01).