Rabbit Medications & Health Conditions

Rabbits are hindgut fermenters with an enormous cecum that contains essential bacteria for digestion and nutrient absorption. This unique physiology makes rabbit pharmacology fundamentally different from dog and cat medicine — and far more dangerous when the wrong drug is administered. Many antibiotics that are routinely safe in dogs and cats can cause fatal disruption of the rabbit's cecal flora, leading to enterotoxemia and death. Working with a rabbit-experienced veterinarian who understands these species-specific risks is essential for safe and effective treatment.

This information is for educational purposes only. Always consult a rabbit-experienced veterinarian before giving any medication to your rabbit.

CRITICAL SAFETY WARNING: Antibiotics That Are Fatal to Rabbits

The following oral antibiotics destroy the essential cecal flora in rabbits, causing fatal dysbiosis and enterotoxemia. There is no reliable antidote. Even with aggressive supportive care, many rabbits given these drugs orally will die.

Amoxicillin (oral) — FATAL
Amoxicillin-clavulanic acid (oral) — FATAL
Cephalosporins (oral, all types) — FATAL
Clindamycin (oral) — FATAL
Lincomycin (oral) — FATAL
Erythromycin (oral) — FATAL
Penicillin (oral) — FATAL

Important distinction: Penicillin G given by injection IS safe for rabbits. The injectable form bypasses the GI tract and is a mainstay of rabbit medicine. It is only the oral forms of these antibiotics that are dangerous.

Rabbit-safe antibiotics include: enrofloxacin, trimethoprim-sulfa, chloramphenicol, azithromycin, and injectable penicillin G.

Common Conditions in Rabbits

Rabbits are prone to gastrointestinal, dental, and respiratory conditions that can escalate rapidly. GI stasis is the single most common emergency in pet rabbits and every owner should know the signs.

Common Medications for Rabbits

Most rabbit medications are off-label. Compounding is often necessary due to the small body sizes involved. Always confirm that any antibiotic prescribed for your rabbit is on the safe list for this species.

Safe Antibiotics

Enrofloxacin (Baytril) — First-line oral antibiotic; safe for rabbit gut flora
Trimethoprim-Sulfa — Oral; safe alternative broad-spectrum antibiotic
Azithromycin — Oral; gut-safe option for respiratory and other infections
Chloramphenicol — Oral; reserved for resistant infections
Penicillin G (injectable only) — Safe by injection; mainstay for pasteurellosis and abscesses

Pain Management

Meloxicam — Preferred NSAID for rabbits; critical for GI stasis recovery
Buprenorphine — Opioid for moderate to severe pain

GI Support

Cisapride — Prokinetic (only if obstruction ruled out)
Metoclopramide — Alternative prokinetic
Simethicone — OTC gas relief; safe for rabbits

Antiparasitic

Fenbendazole (Panacur) — 28-day course for E. cuniculi; also used for intestinal parasites
Ivermectin — For mites (fur mites, ear mites)
Selamectin (Revolution) — Topical parasite treatment

Emergency & Supportive

Subcutaneous Fluids — Critical for GI stasis; often 100 mL/kg/day
Oxbow Critical Care — Syringe feeding formula for rabbits that stop eating