Cephalexin for Dwarf Hamsters

Pocket Pet · Phodopus spp. · typical adult weight 0.02–0.05 kg

Cephalexin is dosed at 25 mg/kg SC q24h in dwarf hamsters, per Carpenter Exotic Animal Formulary 6th ed, Table 9.1 (Antimicrobial and Antifungal Agents Used in Rodents), Cephalexin, row Hamsters, gerbils. The held copy is an ebook conversion with no printed page numbers, so the TABLE is the citable location. SOURCE CONFLICT DISCLOSED: Carpenter attributes this row to ref 130 = Morrisey JK, Carpenter JW. Formulary. In: Quesenberry KE, Carpenter JW, eds. Ferrets, Rabbits, and Rodents: Clinical Medicine and Surgery, 4th ed. Elsevier, St. Louis, MO -- 2021:620-630 -- but that source, Appendix Table A.1, Gerbils/Hamsters column, prints 25 mg/kg SC q12h, not q24h. The served q24h is Carpenter own printed interval and the lower daily exposure of the two. SOURCE EDITION: Carpenter Exotic Animal Formulary -- ISBN 9780323833929 — SOURCE ROW: Carpenter's Exotic Animal Formulary 6th ed, Table 9.1, corpus p.771 — "Cephalexin ... 25 mg/kg SC q24h(130) ... Hamsters, gerbils". Superscript 130 resolves to Morrisey & Carpenter, Formulary, in Quesenberry & Carpenter (eds), Ferrets, Rabbits and Rodents 4th ed, 2021:620-630 - so Carpenter and FRR are one chain, not two sources.. Cephalexin is used in dwarf hamsters for Antimicrobial. Routes documented in dwarf hamsters: SC. A typical adult dwarf hamster weighs 0.02–0.05 kg. ExoticRx lists 1 cited dose rule for Cephalexin in dwarf hamsters, drawn from published veterinary references. Verify against current literature before clinical use.

US trade names: Keflex

Contraindicated in Rabbit, Guinea Pig, Chinchilla, Hamster, Degu

Rabbit: Oral beta-lactams cause fatal dysbiosis in rabbitsOral amoxicillin (and other oral beta-lactams) selectively destroy gram-positive hindgut flora in rabbits, allowing Clostridium spiroforme overgrowth and fatal enterotoxemia. Never administer oral beta-lactams to rabbits. Parenteral administration carries a lower risk than the oral route, but is not established as safe in rabbits.
Guinea Pig: Oral beta-lactams cause fatal dysbiosis in guinea pigsOral amoxicillin reliably causes Clostridium difficile-mediated fatal enterotoxemia in guinea pigs. Same mechanism as in rabbits. Parenteral administration carries a lower risk than the oral route; parenteral ceftiofur specifically has been given to guinea pigs and chinchillas without adverse effect.
Chinchilla: Oral beta-lactams cause fatal dysbiosis in chinchillasChinchillas are hindgut fermenters with the same flora dependence as rabbits and guinea pigs. Oral penicillins and oral cephalosporins trigger Clostridium overgrowth and fatal enterotoxemia. Never give oral beta-lactams; parenteral routes and trimethoprim-sulfa, fluoroquinolones, or chloramphenicol are the safer choices.
Hamster: Oral beta-lactams cause fatal enterocolitis in hamstersHamsters are exquisitely susceptible to antibiotic-associated Clostridium difficile enterocolitis — the hamster is the classic laboratory model for it. Oral penicillins and cephalosporins are reliably fatal. Never administer oral beta-lactams.
Degu: Oral beta-lactams risk fatal dysbiosis in degusDegus are caviomorph hindgut fermenters closely related to chinchillas and guinea pigs. Degu-specific data is limited, so this warning is extrapolated from those related hystricomorphs — but the shared physiology makes oral beta-lactam enterotoxemia the expected outcome. Treat as contraindicated; use the safer alternatives.

Dose ranges

Route	Dose	Frequency	Indication	Evidence	Source
SC	25 mg/kg	q24h	Antimicrobial	Moderate	Carpenter Exotic Animal Formulary 6th ed, Table 9.1 (Antimicrobial and Antifungal Agents Used in Rodents), Cephalexin, row Hamsters, gerbils. The held copy is an ebook conversion with no printed page numbers, so the TABLE is the citable location. SOURCE CONFLICT DISCLOSED: Carpenter attributes this row to ref 130 = Morrisey JK, Carpenter JW. Formulary. In: Quesenberry KE, Carpenter JW, eds. Ferrets, Rabbits, and Rodents: Clinical Medicine and Surgery, 4th ed. Elsevier, St. Louis, MO -- 2021:620-630 -- but that source, Appendix Table A.1, Gerbils/Hamsters column, prints 25 mg/kg SC q12h, not q24h. The served q24h is Carpenter own printed interval and the lower daily exposure of the two. SOURCE EDITION: Carpenter Exotic Animal Formulary -- ISBN 9780323833929 — SOURCE ROW: Carpenter's Exotic Animal Formulary 6th ed, Table 9.1, corpus p.771 — "Cephalexin ... 25 mg/kg SC q24h(130) ... Hamsters, gerbils". Superscript 130 resolves to Morrisey & Carpenter, Formulary, in Quesenberry & Carpenter (eds), Ferrets, Rabbits and Rodents 4th ed, 2021:620-630 - so Carpenter and FRR are one chain, not two sources.

What each reference text prints

Every held source for this drug and species, as printed. Where they differ, both are shown — the choice is yours, not ours.

Printed doses in mg/kg for this drug and species, by source
Dose (mg/kg)	Route	Source	As printed
25	SC	Carpenter's Exotic Animal Formulary, 6th edTable 9.1	25 mg/kg SC q24h

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.

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Mechanism of action

Inhibits bacterial cell wall synthesis by binding to PBPs. First-generation cephalosporin with good gram-positive coverage.

Side effects & warnings

May cause GI upset. Use with caution in penicillin-allergic animals (cross-reactivity). Not effective against Pseudomonas.

Species-specific contraindications and adverse-reaction reports for dwarf hamsters may differ from canine / feline reference data — consult the primary citations listed with each rule.

Frequently asked questions

What is the dose of Cephalexin for Dwarf Hamsters?

Cephalexin dose range in dwarf hamsters, with cited source references: SC 25 mg/kg q24h. Reference ranges from cited sources — verify against current literature before clinical use.

How is Cephalexin administered in Dwarf Hamsters?

Documented routes for Cephalexin in dwarf hamsters: SC.

What conditions does Cephalexin treat in Dwarf Hamsters?

Cephalexin is indicated in dwarf hamsters for: Antimicrobial.

What are the side effects of Cephalexin in Dwarf Hamsters?

These are general warnings for Cephalexin across species; consult the dwarf hamster dosing table above for species-specific guidance. May cause GI upset. Use with caution in penicillin-allergic animals (cross-reactivity). Not effective against Pseudomonas.

Other Antibiotic drugs with dwarf hamster dosing

Amikacin Azithromycin Chloramphenicol Ciprofloxacin Doxycycline Enrofloxacin Gentamicin Marbofloxacin Metronidazole Oxytetracycline Sulfadimethoxine Tetracycline

Cephalexin dosing in other species

Ferrets Gerbils Mice Pet Rats Rabbits Sugar Gliders Syrian Hamsters African Grey Parrots

See all species for Cephalexin See all drugs for Dwarf Hamsters

Why a species-specific page? Cephalexin pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in dwarf hamsters — 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.