Description
Elanco Bayrocin 50mg Enrofloxacin Tablet for Dogs – The Original Branded Broad-Spectrum Fluoroquinolone Antibiotic (Strip of 10, MRP ₹55)
Elanco Bayrocin contains Enrofloxacin 50mg per tablet – the original branded veterinary fluoroquinolone antibiotic developed by Bayer Animal Health (now Elanco). It treats UTIs, respiratory, skin, gastrointestinal, and soft tissue bacterial infections in dogs and cats at 5mg/kg once daily. Strip of 10 tablets, MRP ₹55. Schedule H – prescription required. Not for animals under 1 year of age.
What Are The Potential Side Effects?
Gastrointestinal upset – vomiting, nausea, reduced appetite in first 1-2 days; give with food
Cartilage damage in young animals – the most critical safety concern; enrofloxacin causes erosion of cartilage in weight-bearing joints of immature animals. This is why it is absolutely contraindicated in dogs and cats under 1 year of age
Retinal toxicity in cats – fluoroquinolones can cause irreversible retinal damage in cats when overdosed; always use cat-specific dose (5mg/kg/day only – never exceed) and avoid prolonged courses
Central nervous system effects – rare, but seizures or CNS stimulation reported in animals with known or suspected CNS disorders
Photosensitivity – avoid prolonged direct sun exposure during treatment in light-coated animals
How to Use The Product Safely?
Administer orally, once daily, with or after food
Dose: 5mg/kg body weight once daily for 5 days standard; 7-10 days for severe infections
Dog/Cat Weight
Dose at 5mg/kg (1x daily)
5kg
¼ tablet
10kg
½ tablet
20kg
1 tablet
30kg
1.5 tablets
Cats: Always use at the lower end – 5mg/kg once daily only; never exceed this dose due to retinal toxicity risk
Do not use in animals under 1 year of age
How Does Bayrocin Work?
Enrofloxacin is a bactericidal fluoroquinolone – it actively kills bacteria rather than inhibiting growth
Mechanism: inhibits bacterial DNA gyrase and topoisomerase IV – two enzymes essential for bacterial DNA replication, repair, and transcription. Without these, bacteria cannot replicate their genetic material and die
Fluoroquinolones are concentration-dependent antibiotics – efficacy correlates with peak drug concentration relative to the minimum inhibitory concentration, which is why once-daily higher-dose dosing is clinically preferred over twice-daily lower doses
After oral absorption, enrofloxacin distributes into the lungs, skin, kidneys, prostate, and GI tract at concentrations significantly exceeding blood levels – making it effective for deep-tissue infections that surface antibiotics cannot reach
Partially metabolised to ciprofloxacin (another active fluoroquinolone) in the liver, extending its antibacterial effect
Safety Advice
Schedule H – only use with valid vet prescription
Never use in dogs or cats under 1 year old – causes irreversible cartilage damage
Never exceed 5mg/kg/day in cats – retinal toxicity risk is dose-dependent
Do not use in animals with known CNS disorders
Do not use in pregnant or breeding animals without explicit vet guidance – safety not established
Do not combine with antacids or sucralfate – reduces oral absorption
Do not combine with NSAIDs – increased risk of CNS toxicity
Complete the full prescribed course – do not stop early when symptoms improve
Consult your vet before starting if your pet is on theophylline (used for respiratory conditions) – enrofloxacin increases theophylline levels significantly
What If You Miss a Dose?
Give as soon as remembered the same day; if close to next dose time, skip and continue
Do not double up – doubling a fluoroquinolone dose increases CNS and GI side effect risk without therapeutic benefit
Maintain the daily schedule consistently through the full course
All Substitutes
Product
Active Ingredient
Class
Key Distinction
Vetoquinol Meriquin 50mg Tablet for Dogs & Cats
Enrofloxacin 50mg
Fluoroquinolone
Primary equivalent branded alternative – Vetoquinol’s formulation of Enrofloxacin 50mg
Elanco Bayrocin 150mg Tablet for Dogs
Enrofloxacin 150mg
Fluoroquinolone
Higher dose for larger breeds – 1 tablet per 30kg instead of 3 x 50mg
Intas Cefpet 100mg Tablet for Dogs & Cats
Cefpodoxime Proxetil
3rd gen Cephalosporin
Different class – broader spectrum than 1st gen, safer for young animals, safer in cats
Savavet Doxypet Doxycycline Tablet
Doxycycline
Tetracycline
Different class – for tick-borne diseases, intracellular organisms, Mycoplasma
Virbac Lixen Palatab
Amoxicillin-Clavulanate
Beta-lactam + inhibitor
First-line for susceptible gram-positive and mixed infections; safer in young animals
Quick Tips
Always give with food to reduce nausea and improve absorption
Never use in cats at doses above 5mg/kg – retinal toxicity is irreversible
Do not use in animals under 1 year under any circumstances – the cartilage damage is permanent
If prescribing for a UTI, ask your vet about a urine culture before starting – UTI organisms increasingly show enrofloxacin resistance in India, and knowing sensitivity ahead of time prevents treatment failure
Keep the full strip sealed in its blister packaging until use – exposure to moisture degrades tablets
After completing any fluoroquinolone course, consider a probiotic course – browse our dog digestive care range
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Browse all dog antibiotics and antifungals on Supertails
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For expert antibiotic prescription and guidance: consult a vet on Supertails
Disclaimer: Supertails’ sole intention is to ensure that its consumers get information that is expert-reviewed, accurate, and trustworthy. However, the information contained herein should NOT be used as a substitute for the advice of a qualified physician. The information provided here is for informational purposes only. This may not cover everything about particular health conditions, lab tests, medicines, all possible side effects, drug interactions, warnings, alerts, etc. Please consult your doctor and discuss all your queries related to any disease or medicine. We intend to support, not replace, the doctor-patient relationship.
Trusted Fluoroquinolone Coverage – From One of Veterinary Medicine’s Most Respected Names
Vetoquinol Meriquin 50mg delivers Enrofloxacin at a therapeutic dose, once daily, from one of the world’s most established veterinary pharmaceutical companies. It earns its place as a first-choice antibiotic for UTIs, respiratory infections, and deep soft tissue infections in adult dogs and cats – with the critical caveat that it is never used in animals under 1 year old.
FAQs
1. What is Elanco Bayrocin 50mg used for in dogs?
Bayrocin 50mg treats bacterial infections in dogs including urinary tract infections, skin and soft tissue infections, respiratory infections, reproductive tract infections, and GI infections. It contains Enrofloxacin 50mg – a broad-spectrum bactericidal fluoroquinolone developed by Bayer. Dose: 5mg/kg once daily for 3 to 5 days; up to 7 to 10 days for severe infections. Prescription required.
2. Is Bayrocin the same as Meriquin (Vetoquinol)?
Yes – both contain Enrofloxacin 50mg per tablet and are therapeutically equivalent at the same dose. Bayrocin is the original branded enrofloxacin developed by Bayer Animal Health (now Elanco); Meriquin is Vetoquinol’s formulation of the same drug. Clinical outcomes are identical. The choice between them comes down to veterinary preference, availability, and price – Bayrocin 50mg at ₹55 is priced slightly lower than Meriquin at ₹79 per strip.
3. Can Bayrocin be used for a dog’s UTI?
Yes – enrofloxacin is widely considered a drug of choice for UTIs in dogs. After oral absorption, it achieves urinary concentrations far exceeding the minimum inhibitory concentrations needed to clear common UTI pathogens including E. coli, Proteus, and Klebsiella. Your vet may recommend a urine culture before starting to confirm sensitivity, particularly for recurring UTIs where resistance is more likely.
4. Is there a 150mg Bayrocin for large dogs?
Yes – Elanco also makes Bayrocin 150mg, available on Supertails at this link. For large dogs above 30kg, the 150mg tablet allows a single full tablet rather than multiple 50mg tablets per dose. Your vet will prescribe the appropriate strength based on your dog’s weight and the severity of the infection.
