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Antimicrobial Pharmacokinetics for Companion Animals

This website is designed to give you easy access to literature-based data on the pharmacokinetics of commonly used antimicrobials in dogs, cats and horses.  The pharmacokinetics of antimicrobials are important in designing dose regimens or determining if successful treatment is likely if you know the susceptibility of the organism.

You can navigate this site by the sidebar menu, or view a full listing of all drugs for one particular companion animal by clicking "see all." PLEASE pay attention to all graph titles, which will specify not only the administration route, but in some cases the drug form or target bacterial species as well.

This website is a work in progress, with new data and drugs added as time is available.  Effort has been made to ensure accuracy of the data and the references, but if errors are found, please contact Virginia Fajt at  If you have additional data on dogs, cats, and horses that should be added to the site, please let us know.

For a review of antimicrobial susceptibility testing, see
Interpreting Antimicrobial Susceptibility Results

For a review of how drugs move through the body, see
Review of How Drugs Move Through the Body

For a more in-depth discussion of pharmacokinetic concepts and modeling, see this on-line course:
Biopharmaceutics and Pharmacokinetics

Acknowledgements: Funding for this website has been provided by the Department of Veterinary Physiology and Pharmacology, Texas A&M University College of Veterinary Medicine and Biomedical Sciences.  Contributors to the project include Clayton McCook, Charles Collins, Patty Grana, Mel Bilgic, Lisa Montoya, Justin Box, Julianne Moore, Rebecca Gooder, and Stephanie Morel.