Understanding the Veterinary Medicines Regulations

The Veterinary Medicines Regulations (VMRs) are the main legal framework for the authorisation, manufacture, distribution, prescription and use of veterinary medicines in the United Kingdom. These regulations are essential for ensuring the safety, quality and efficacy of medicines used to treat animals, as well as protecting public health, animal health and the environment.

The current regulations are maintained and enforced by the Veterinary Medicines Directorate (VMD), an executive agency of the Department for Environment, Food & Rural Affairs (DEFRA).

Whether you are a veterinary professional, a farmer, an animal owner, or involved in pharmaceutical supply, understanding the VMRs is vital for legal and responsible medicine use.

Purpose and Legal Basis

The Veterinary Medicines Regulations exist to ensure that:

• All veterinary medicines used in the UK are properly authorised

• These medicines are manufactured to a high standard of safety and quality

• There is control over their marketing, sale, supply and administration

• Residues of medicines in food-producing animals are regulated to protect the food chain

The most recent version, the Veterinary Medicines Regulations 2013 (as amended), incorporates adjustments made after the UK’s departure from the European Union. The VMD is responsible for updating and enforcing these regulations in Great Britain, while Northern Ireland continues to follow EU legislation under the Northern Ireland Protocol.

Categories of Veterinary Medicines

Veterinary medicines are classified into legal distribution categories, which determine who can supply and administer them:

• POM-V: Prescription-only medicine, veterinarian. Must be prescribed and supplied by a vet.

• POM-VPS: Prescription-only medicine, veterinarian, pharmacist, or suitably qualified person. Available from a vet, pharmacist, or SQP with a valid prescription.

• NFA-VPS: Non-food animal medicine, veterinarian, pharmacist or SQP. Can be supplied without a prescription but only by qualified individuals.

• AVM-GSL: Authorised veterinary medicine – general sales list. Can be sold over the counter by any retailer.

These categories help ensure that more potent or risky medicines are only used with proper professional oversight.

Authorisation and Licensing

Before a veterinary medicine can be marketed or used in the UK, it must be granted a marketing authorisation by the VMD or, in some cases, the European Medicines Agency (for Northern Ireland). This involves a thorough review of:

• Safety for the animal

• Safety for the user

• Safety for the environment

• Efficacy for the condition intended

• Quality of manufacture

Each authorised medicine is listed on the VMD's Product Information Database and must carry a product licence number on its packaging.

The Cascade

The Cascade is a legal exemption within the VMRs that allows vets to prescribe medicines not specifically authorised for a condition in a particular species when no authorised alternative is available. The hierarchy is as follows:

1. A veterinary medicine authorised in the UK for another animal species or condition

2. A medicine authorised for human use

3. A specially prepared medicine (extemporaneous preparation) by a pharmacist or vet

The vet must keep clear records of all Cascade prescriptions and ensure that withdrawal periods are correctly applied for food-producing animals.

Supply and Storage

The VMRs set strict rules for the storage, record-keeping, and dispensing of veterinary medicines:

• All medicines must be stored securely and at the correct temperature

• Expiry dates must be observed

• Prescription records must be kept for at least 5 years

• Labels must include necessary information such as dosage, route of administration, and withdrawal periods

Anyone involved in the supply chain—including vets, pharmacists and SQPs—must comply with these standards to ensure safety and traceability.

Use in Food-Producing Animals

There are extra responsibilities when prescribing or administering medicines to animals intended for human consumption, such as cattle, pigs, poultry and fish. These include:

• Respecting maximum residue limits (MRLs)

• Observing mandatory withdrawal periods

• Keeping detailed medicine records

• Only using products that are authorised for food-producing species

Failure to follow these rules can result in contamination of the food chain and severe legal consequences.

Internet Sales and Advertising

Veterinary medicines can only be advertised and sold online if the seller is properly authorised and registered with the VMD’s Accredited Internet Retailer Scheme (AIRS). The regulations also prohibit misleading or unauthorised advertising of prescription medicines.

Consumers should be cautious when purchasing veterinary medicines online and verify the seller's legitimacy through the AIRS register.

Import and Export

Veterinary medicines imported into the UK must comply with UK authorisation requirements. Special Import Certificates (SICs) may be granted in exceptional circumstances, allowing access to medicines not authorised in the UK.

Exporters must also comply with traceability and packaging laws, and ensure products are suitable for the intended destination country.

Pharmacovigilance

The VMRs require reporting of adverse events involving veterinary medicines, including:

• Unexpected side effects in animals

• Reactions in humans handling the product

• Lack of efficacy

• Environmental impact

Reports must be submitted to the VMD by vets, animal owners, and marketing authorisation holders. This helps monitor medicine safety and informs regulatory action where needed.

Inspections and Enforcement

The VMD conducts routine and targeted inspections of:

• Veterinary practices

• Manufacturers and wholesalers

• Retailers and online suppliers

Enforcement actions can include improvement notices, suspension of licences, or criminal prosecution in serious cases of non-compliance. The VMD also investigates illegal medicines or unauthorised marketing practices.

Brexit and Ongoing Developments

Since Brexit, the UK has gained flexibility in how veterinary medicines are regulated. In 2023, the VMD launched a public consultation on reforming the VMRs to:

• Improve availability of medicines

• Modernise the Cascade

• Support innovation in animal health products

• Strengthen environmental protections

Stakeholders are encouraged to engage with future consultations to help shape a regulatory system that supports both safety and accessibility.

Responsibilities of Animal Owners and Keepers

If you own or care for animals, you have legal duties under the VMRs to:

• Use medicines only as prescribed or directed

• Store them correctly

• Observe withdrawal periods for food animals

• Keep records of treatments

• Never use unauthorised or unlicensed products

These rules help protect animal health, public health, and the environment.

Where to Find More Information

• Veterinary Medicines Directorate – www.gov.uk/vmd

• Product Information Database – www.vmd.defra.gov.uk/ProductInformationDatabase

• Veterinary Medicines Regulations 2013 – www.legislation.gov.uk

• RCVS and BVA guidance on medicine use

• NOAH Compendium – www.noahcompendium.co.uk

Final Thoughts

The Veterinary Medicines Regulations are vital to ensuring that animal treatments are safe, effective and responsibly used. By understanding the key principles—from licensing and supply to use and reporting—you can help uphold high standards in animal welfare, public health and environmental safety.

Whether you're a vet, a pet owner, a farmer or a business involved in the supply chain, compliance with the VMRs is not just a legal requirement—it’s a fundamental part of responsible animal care.