Caninsulin
First-line insulin for diabetic dogs (and some cats). Twice-daily injection with each meal. Lifelong therapy. Active ingredient: porcine zinc insulin.
Key takeaways
- Caninsulin treats first-line insulin for diabetic dogs (and some cats). twice-daily injection with each meal. lifelong therapy
- Typical UK vet price £48 to £68 per month, based on observed dispensary list pricing across UK practices.
- Cheapest VMD-approved online from around £33 per month, versus £37 at the upper end of the same six pharmacies.
- Prescription works the same way, ask your vet for a written Caninsulin prescription (capped at £21), dispense online.
- Main side effect to watch for: hypoglycaemia if overdosed, 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 OnlineCaninsulin Suspension for Injection for Dogs and Cats 40IU/ml 10mlVisit pharmacy →£34.49per 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: 40 IU/ml. 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
Cold-chain insulin attracts a substantial dispensing margin at vet level. The same MSD product is regularly £25-£30 cheaper per vial online.
Common side effects
- Hypoglycaemia if overdosed
- Local injection-site reaction
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
- Does insulin need refrigeration?
- Yes - keep Caninsulin in the fridge at 2-8°C. Most online pharmacies post in cold-chain packaging.
- How many vials per month?
- Depends on the dog's dose and size. A typical 20 kg diabetic dog uses one 10 ml vial every 4-8 weeks.
Similar medications
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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.