Caninsulin
First-line insulin for diabetic dogs (and some cats). Twice-daily injection with each meal. Lifelong therapy. Active ingredient: porcine zinc insulin.
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.
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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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
- 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
Track Caninsulin price drops
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Stop overpaying for Caninsulin.
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.