Pexion
First-line antiepileptic for idiopathic epilepsy in dogs. Twice-daily dosing. Lifelong therapy with substantial cumulative savings online. Active ingredient: imepitoin.
Key takeaways
- Pexion treats first-line antiepileptic for idiopathic epilepsy in dogs. twice-daily dosing. lifelong therapy with substantial cumulative savings online
- Typical UK vet price £53 to £77 per month, based on observed dispensary list pricing across UK practices.
- Cheapest VMD-approved online from around £0.33 per month, versus £0.67 at the upper end of the same six pharmacies.
- Prescription works the same way, ask your vet for a written Pexion prescription (capped at £21), dispense online.
- Main side effect to watch for: polyphagia, review the full list with your prescribing vet before starting or changing dose.
Live verified pricing
Just checkedLast refreshed 17 May 2026We checked the pharmacy product page directly. Prices below are the actual per-unit list price for the variant linked, confirm on the pharmacy site before buying.
- Pet Drugs OnlinePexion Tablets for Dogs 100mgVisit pharmacy →£0.49per unit
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: 100 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.
Last refreshed: 17 May 2026. Always confirm the current price on the pharmacy site before purchase.
Why it costs more at the vet
Boehringer Ingelheim-branded; lifelong dispensing makes vet mark-up especially costly over the dog's lifetime.
Common side effects
- Polyphagia
- Polydipsia
- Hyperactivity (transient)
Not a complete list. Always read the patient information leaflet and speak to your vet about side effects.
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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.
Common questions
- How long until Pexion stops the seizures?
- Effect builds over 1-2 weeks. Some dogs need dose adjustment or an add-on drug like phenobarbital.
- Will my dog need bloods on Pexion?
- Less monitoring than phenobarbital, but routine bloods 6-monthly are sensible.
Similar medications
Track Pexion price drops
We'll email when Pexion drops in price at any of the pharmacies above.
Stop overpaying for Pexion.
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.