Preface

Welcome to Part A of the 12th edition of the BSAVA Small Animal Formulary, providing fully reviewed and up-to-date information about the medications used for the treatment of cats and dogs.

Data relating to drug use, adverse reactions and drug interactions can change between print editions of the formulary; veterinary surgeons and nurses are reminded to also consult the online or app version of the Formulary and other reliable sources when confronted with a medication with which they are unfamiliar.

The Formulary provides information about many drugs not authorized for use in animals. Authorized products should be considered first but when such products are not available, are not clinically suitable, or are from a higher antibiotic tier, unauthorized medicines may be used in accordance with the cascade. In such cases, a clear clinical justification, made on an individual basis, should be recorded in the clinical notes or on the prescription.

I would like to thank all the Editorial Panel members for their hard work in updating the monographs. My sincere gratitude also goes to the editorial team members at BSAVA. Please do provide comments and feedback on this latest edition of the BSAVA Small Animal Formulary to formulary@ bsava.com so that it can be further improved in the future.

Fergus Allerton January 2026