Question to the Department for Environment, Food and Rural Affairs:

To ask the Secretary of State for Environment, Food and Rural Affairs, with reference to her Department's document entitled Guidelines and guidance on the responsible use of veterinary medicines, updated on 8 October 2024, what assessment she has made of the potential impact of the inclusion of blanket flea and worming treatments in veterinary health plans on the responsible use of veterinary medicine and antimicrobials in animals.

Flea and tick products play an important role in protecting animal and human health; however, the Veterinary Medicines Directorate (VMD) recognises increasing concerns about the environmental impacts of substances such as fipronil and imidacloprid. Monitoring in England has detected these substances in some watercourses at levels that may pose a risk to aquatic invertebrates.

The VMD is leading cross‑government work through the Pharmaceuticals in the Environment Group to support responsible use of these products. Recently published VMD‑funded studies (2024–25) have shown that spot‑on flea and tick products can contribute to environmental levels of imidacloprid and fipronil through wastewater pathways and when dogs swim. These findings strengthen the evidence base, but important gaps remain, including understanding the potential unintended consequences if usage patterns change. This is being considered as part of wider stewardship work to ensure future decisions remain proportionate, evidence based and protective of animal welfare.