Ampicillin for Blue-tongue Skinks

Reptile · Tiliqua scincoides · typical adult weight 0.25–0.60 kg

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.

Ampicillin is dosed at 10–20 mg/kg SC, IM q12h in blue-tongue skinks, per Hedley J. BSAVA Small Animal Formulary: Exotic Pets, British Small Animal Veterinary Association, Quedgeley, UK; 2020. | Klaphake E, Gibbons PM, Sladky KK, et al. Reptiles. In: Carpenter JW, eds. Exotic Animal Formulary, 5th ed., Elsevier, St. Louis, MO; 2018:81-166. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.212 — Carpenter's Exotic Animal Formulary 6th ed, Table 4.1 (Antimicrobial Agents Used in Reptiles.a,b). Ampicillin is used in blue-tongue skinks for Bacterial infection. Routes documented in blue-tongue skinks: SC, IM. A typical adult blue-tongue skink weighs 0.25–0.60 kg. ExoticRx lists 1 cited dose rule for Ampicillin in blue-tongue skinks, drawn from published veterinary references. Verify against current literature before clinical use.

Dose ranges

Route	Dose	Frequency	Indication	Evidence	Source
SC, IM	10–20 mg/kg	q12h	Bacterial infection	Weak	Hedley J. BSAVA Small Animal Formulary: Exotic Pets, British Small Animal Veterinary Association, Quedgeley, UK; 2020. \| Klaphake E, Gibbons PM, Sladky KK, et al. Reptiles. In: Carpenter JW, eds. Exotic Animal Formulary, 5th ed., Elsevier, St. Louis, MO; 2018:81-166. — Source: Carpenter's Exotic Animal Formulary, 6th Ed, p.212 — Carpenter's Exotic Animal Formulary 6th ed, Table 4.1 (Antimicrobial Agents Used in Reptiles.a,b).Compilation only — we have not located an independent source that prints this figure.

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
10–20	SC	BSAVA Small Animal Formulary, 10th ed — Part B (Exotic Pets)p.23	10-20 mg/kg s.c., i.m. q12-24h (most species); Hermann’s tortoises: 50 mg/kg i.m. q12h
50	IM	BSAVA Small Animal Formulary, 10th ed — Part B (Exotic Pets)p.23	/kg s.c., i.m. q12-24h (most species); Hermann’s tortoises: 50 mg/kg i.m. q12h
10–20	SC	Carpenter's Exotic Animal Formulary, 6th edTable 4.1	10-20 mg/kg SC, IM q12h,243
10–20	SC	Mader's Reptile and Amphibian Medicine and Surgery, 3rd edTable 127.1	10-20 mg/kg SC, IM q12h148 Most species, including chameleons

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.

Calculate the dose for your blue-tongue skink

3 a day (1 exotic) · no account needed

Drug

Ampicillin (Polyflex)

Weight

Typical range: 250–600 g

Route

Concentration (optional, mg/ml)

If provided, volume will be calculated alongside dose.

Reference only. Verify against current literature before clinical use.

Side effects & warnings

CONTRAINDICATED in rabbits, guinea pigs, and hamsters (fatal dysbiosis). May cause GI upset. Cross-reactivity with other beta-lactams. IM injection may be painful.

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

Frequently asked questions

What is the dose of Ampicillin for Blue-tongue Skinks?

Ampicillin dose range in blue-tongue skinks, with cited source references: SC, IM 10–20 mg/kg q12h. Reference ranges from cited sources — verify against current literature before clinical use.

How is Ampicillin administered in Blue-tongue Skinks?

Documented routes for Ampicillin in blue-tongue skinks: SC, IM.

What conditions does Ampicillin treat in Blue-tongue Skinks?

Ampicillin is indicated in blue-tongue skinks for: Bacterial infection.

What are the side effects of Ampicillin in Blue-tongue Skinks?

These are general warnings for Ampicillin across species; consult the blue-tongue skink 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. IM injection may be painful.

Why a species-specific page? Ampicillin pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in blue-tongue skinks — the rules above are the citations specific to this species, not generic recommendations.