Peer-reviewed veterinary case report
How famciclovir medicine acts in healthy cats after oral doses
By Qu, Mengke et al.·Published in Frontiers in veterinary science·2025·West China School of Pharmacy, China·View original on PubMed →
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Original publication title: Non-linear pharmacokinetics of penciclovir in healthy cats after single and multiple oral administration of famciclovir.
- Species:
- cat
Plain-English summary
A group of healthy cats were given famciclovir, an antiviral medication, to see how well it worked for treating Feline Infectious Rhinobronchitis (FVR), a serious respiratory disease caused by feline herpesvirus. The study found that the amount of famciclovir absorbed into the cats' systems varied depending on the dose, and after multiple doses, the drug levels fluctuated significantly without building up in their bodies. This research helps veterinarians understand how to better dose famciclovir for treating FVR in cats, ensuring they receive effective treatment without side effects.
People also search for: cat respiratory infection treatment · famciclovir for cats · feline herpesvirus symptoms · how to treat FVR in cats
Abstract
INTRODUCTION: Feline Infectious Rhinobronchitis (FVR) is a common and serious infectious upper respiratory disease. Famciclovir, an antiviral prodrug initially developed for human herpesviruses, demonstrates significant therapeutic efficacy in cats with FVR caused by feline herpesvirus type 1 (FHV-1). METHODS: To determine the pharmacokinetics of famciclovir in healthy cats after single or multiple oral and intravenous administrations-40 cats in 4 different dose groups received famciclovir through a single oral dose, while 10 cats received famciclovir every 12 h for 14 days, and another 10 cats received a single intravenous dose of penciclovir-in three different phases. At the predetermined time points, blood samples were collected through the radial vein of the cat. The blood samples were analyzed by liquid chromatography-tandem mass spectrometry to detect the concentration of penciclovir in cat plasma. The pharmacokinetic parameters of penciclovir were calculated using a noncompartmental model. RESULTS: After a single oral administration in cats, the absorption and exposure of famciclovir tablets also increased with the increase in dose. After multiple oral administrations of famciclovir tablets, the concentration of the drug fluctuated violently in steady state with no accumulation in the body. The absolute bioavailability of the tested cats after single oral administration of 15.625 g, 31.25, 62.5, and 93.75 mg/kg famciclovir tablets was 67.12, 33.94, 26.45, and 18.37%, respectively. DISCUSSION: In summary, after oral administration in cats, the absorption and exposure of famciclovir tablets showed overall non-linear pharmacokinetic characteristics. This study provides a scientific basis for the clinical dosage and duration of treatment of FVR with famciclovir tablets.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/41404118/