Is Rilexine OK for dogs with penicillin allergy?

Cephalosporins and penicillins share some cross-reactivity. The vet decides based on the dog's history.

Can I crush Rilexine into food?

Yes - the tablets are flavoured but can be split. Confirm with the vet.

Rilexine price comparison UK

Cephalosporin antibiotic for bacterial skin infections (pyoderma) and urinary tract infections in dogs. Active ingredient: cephalexin. Below: compare UK vet prices with VMD-approved online pharmacies for your dog's weight.

Dog weight (kg)Your vet's price per month (optional, £)

Typical vet price

£25.00–£35.00/mo

indicative UK range

Cheapest online

no data

Annual saving

—

after £21 prescription fee: £0.00–£0.00

Based on a 15 kg dog, recommended strength: 75 mg. Assumes 12 months of continuous use (chronic dosing) and one written prescription per year. CMA Order caps the prescription fee at £21 for the first medicine, plus £12.50 per additional medicine on the same prescription. Prices are indicative and last verified 2026-05-15. Always confirm the current price on the pharmacy site before purchase.

No online price data yet for Rilexine at this strength. We are building the database - check back soon.

What Rilexine treats

Cephalosporin antibiotic for bacterial skin infections (pyoderma) and urinary tract infections in dogs.

Why it costs more at the vet

Virbac-branded chewable cephalexin; the same drug as several human generics.

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How to get a written prescription

The CMA Order is legally binding by 23 September 2026. Every UK vet must offer a written prescription on request, with the fee capped at £21 for the first medicine plus £12.5 per additional medicine on the same prescription. Take the prescription to any VMD-approved online pharmacy listed above. We have a short guide with a template email you can send to your practice.

Read the full prescription guide →

Common side effects

Vomiting
Soft stools

This is not a complete list. Always read the patient information leaflet and speak to your vet about side effects.

FAQ

Is Rilexine OK for dogs with penicillin allergy?: Cephalosporins and penicillins share some cross-reactivity. The vet decides based on the dog's history.
Can I crush Rilexine into food?: Yes - the tablets are flavoured but can be split. Confirm with the vet.

Related medications

Antibiotic

Synulox

Broad-spectrum antibiotic for bacterial skin, urinary, respiratory and dental infections in dogs. Combines amoxicillin with clavulanic acid to resist beta-lactamase.

Lincosamide antibiotic for deep skin infections, dental infections and osteomyelitis where Gram-positive cover is needed.

Doxycycline for tick-borne disease (including Lyme and Ehrlichia), kennel cough, and skin infections caused by resistant organisms.

Track Rilexine price drops

We'll email when Rilexine drops in price at any of the pharmacies above.

Pricing data status: indicative. Last verified 2026-05-15. Pharmacies change prices regularly - always confirm before purchase. Not medical advice.