Open call for evidence

Flea and tick treatments for cats and dogs: environmental impacts

• From: Veterinary Medicines Directorate
• Published: 16 April 2026

Summary

We are seeking evidence on the environmental impacts of flea and tick treatments containing fipronil or imidacloprid and views on potential impacts of changing how these medicines are supplied.

This call for evidence is being held on another website.

This call for evidence closes at
11:59pm on 11 June 2026

Call for evidence description

The Veterinary Medicines Directorate is seeking evidence on the residues or effects of flea and tick treatments containing fipronil or imidacloprid in the environment.

We are also seeking views on whether professional advice at the point of sale could support responsible use and disposal. We want to understand how any changes to supply routes might affect pet owners, animal health and welfare, businesses, and access to these medicines.

This evidence will inform a review of how these medicines are supplied.

Published 16 April 2026