Epiphen
Alternative phenobarbital brand to Phenoleptil. Same molecule, different presentation. Controlled drug (Schedule 3). Active ingredient: phenobarbital.
See your saving over a year
Pick your dog's weight (and optionally your vet's actual quote) to see the exact monthly and annual saving. The price comparison table below sorts pharmacies by cheapest first; we never sort by commission.
Based on a 15 kg dog, recommended strength: 30 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.
Why it costs more at the vet
Dechra-branded phenobarbital; pricing structurally similar to Phenoleptil.
Common side effects
- Sedation (early)
- Polyphagia
- Hepatic enzyme elevation
Not a complete list. Always read the patient information leaflet and speak to your vet about side effects.
Ready to switch? It takes 5 minutes.
Copy-paste email template, prescription steps and refill setup. From "I just paid too much at the vet" to "I'm saving £X every month".
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.
Common questions
- Epiphen vs Phenoleptil - same drug?
- Yes, identical molecule. Use whichever your prescription specifies and whichever pharmacy stocks the right strength.
- Can I switch brands mid-course?
- On veterinary advice yes - bioequivalent, but switching should be done with serum level monitoring.
Similar medications
Track Epiphen price drops
We'll email when Epiphen drops in price at any of the pharmacies above.
Stop overpaying for Epiphen.
Same medicine, same regulator, same vet relationship — half the price. Five-minute switch from in-clinic dispensing to a VMD-approved online pharmacy.
Pricing data status: indicative. Last verified 2026-05-15. Pharmacies change prices regularly — always confirm before purchase. Not medical advice.