Cat · Felis catus · typical adult weight 2.50–7.00 kg
Contraindicated in Rabbit, Guinea Pig, Chinchilla, Hamster, Degu
Amoxicillin is dosed at 11–15 mg/kg PO q8-12h for 3 to 5 days in cats, per Weese JS, Blondeau J, Boothe D, et al. International Society for Companion Animal Infectious Diseases (ISCAID) guidelines for the diagnosis and management of bacterial urinary tract infections in dogs and cats. Vet J. 2019;247:8-25. Distributed by John Wiley & Sons, Inc. — Plumb's 10th ed printed p.67, Amoxicillin monograph spanning p.67-69. Amoxicillin is used in cats for Feline lower urinary tract disease (bacterial), Dental infections, Bacterial infections (skin, UTI, dental, respiratory), Upper respiratory infection. Routes documented in cats: PO. A typical adult cat weighs 2.50–7.00 kg. ExoticRx lists 4 cited dose rules for Amoxicillin in cats, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Amoxi-Tabs, Amoxil
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| PO | 11–15 mg/kg | q8-12h for 3 to 5 days | 7-14 days | Feline lower urinary tract disease (bacterial) | Strong | Weese JS, Blondeau J, Boothe D, et al. International Society for Companion Animal Infectious Diseases (ISCAID) guidelines for the diagnosis and management of bacterial urinary tract infections in dogs and cats. Vet J. 2019;247:8-25. Distributed by John Wiley & Sons, Inc. doi:10.1016/j.tvjl.2019.02.008 — Plumb's 10th ed printed p.67, Amoxicillin monograph spanning p.67-69. |
| PO | 11–22 mg/kg | q8h | 7-10 days | Dental infections | Strong | Plumb's Veterinary Drug Handbook, 10th ed (2023) — Plumb's 10th ed printed p.67, Amoxicillin monograph spanning p.67-69. — Plumb's 10th ed printed p.69, Amoxicillin monograph. — Plumb's Veterinary Drug Handbook, 10th ed, Amoxicillin monograph, printed p.69, CATS: "Systemic infections (extra-label): 11 - 22 mg/kg PO every 8 hours; duration of treatment should be […]" |
Every held source for this drug and species, as printed. Where they differ, both are shown — the choice is yours, not ours.
| Dose (mg/animal) | Route | Source | As printed |
|---|---|---|---|
| 62.5 | PO | Papich Saunders Handbook of Veterinary Drugs, 4th edp.68 | • 62.5 mg/cat q12h PO. Consider administering these doses every 8 hours for |
| Dose (mg/kg) | Route | Source | As printed |
|---|---|---|---|
| 15 | IM | BSAVA Small Animal Formulary, 10th ed — Part A (Canine and Feline)p.41 | 7 mg/kg i.m. q24h; 15 mg/kg i.m. q48h for depot preparations. |
| 10 | PO | BSAVA Small Animal Formulary, 10th ed — Part A (Canine and Feline)p.41 | ■ 10 mg/kg p.o. q8-12h. ■ 11-15 mg/kg p.o. q8h for bacterial cystitis. Evidence of a |
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Inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins (PBPs).
CONTRAINDICATED in rabbits, guinea pigs, and hamsters (fatal dysbiosis). May cause GI upset. Cross-reactivity with other beta-lactams.
Species-specific contraindications and adverse-reaction reports for cats may differ from canine / feline reference data — consult the primary citations listed with each rule.
Amoxicillin dose ranges in cats, with cited source references: PO 11–15 mg/kg q8-12h for 3 to 5 days; PO 11–22 mg/kg q8h; PO 10–22 mg/kg q8-12h; PO 10–22 mg/kg q8-12h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Amoxicillin in cats: PO.
Cited course lengths for Amoxicillin in cats include: 7-14 days; 7-10 days. Duration depends on the indication — match it to the specific dose rule in the table above.
Amoxicillin is indicated in cats for: Feline lower urinary tract disease (bacterial), Dental infections, Bacterial infections (skin, UTI, dental, respiratory), Upper respiratory infection.
These are general warnings for Amoxicillin across species; consult the cat dosing table above for species-specific guidance. CONTRAINDICATED in rabbits, guinea pigs, and hamsters (fatal dysbiosis). May cause GI upset. Cross-reactivity with other beta-lactams.
Why a species-specific page? Amoxicillin pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in cats — the rules above are the citations specific to this species, not generic recommendations.
Sourced from published veterinary references; awaiting credentialed clinical reviewer. See our editorial process. Reference only — not veterinary advice.
| PO | 10–22 mg/kg | q8-12h | 7-14 days | Bacterial infections (skin, UTI, dental, respiratory) | Strong | Plumb's Veterinary Drug Handbook, 10th ed (2023) — Plumb's 10th ed printed p.67, Amoxicillin monograph spanning p.67-69. — Plumb's 10th ed printed p.69, Amoxicillin monograph. — Plumb's Veterinary Drug Handbook, 10th ed, Amoxicillin monograph, printed p.69, CATS: "Systemic infections (extra-label): 11 - 22 mg/kg PO every 8 hours."Compilation only — we have not located an independent source that prints this figure. |
| PO | 10–22 mg/kg | q8-12h | 7-14 days | Upper respiratory infection | Strong | Leib MS. Helicobacter Gastritis: Does it Cause Vomiting in Dogs and Cats? In: Western States Veterinary Conference Proceedings; 2012. — Plumb's 10th ed printed p.67, Amoxicillin monograph spanning p.67-69.Compilation only — we have not located an independent source that prints this figure. |
| 7 | IM | BSAVA Small Animal Formulary, 10th ed — Part A (Canine and Feline)p.41 | 7 mg/kg i.m. q24h; 15 mg/kg i.m. q48h for depot preparations. |
| 16–33 | IV | BSAVA Small Animal Formulary, 10th ed — Part A (Canine and Feline)p.41 | ion, causal organism and severity of the disease. (Doses of 16-33 mg/kg i.v. q8h are used in humans to treat serious infections.) |
| 11–15 | PO | BSAVA Small Animal Formulary, 10th ed — Part A (Canine and Feline)p.41 | ■ 10 mg/kg p.o. q8-12h. ■ 11-15 mg/kg p.o. q8h for bacterial cystitis. Evidence of a need for clavulanic acid is lacki |
| 6.6–20 | PO | Papich Saunders Handbook of Veterinary Drugs, 4th edp.67 | • 6.6-20 mg/kg q8-12h PO. |
Figures are transcribed from the cited page or table of each held edition and are shown for reference only. They are not dose recommendations, they do not feed the calculator, and none has been reviewed by a veterinarian.