Soloxine / Thyforon (Levothyroxine)
Hormone replacement for hypothyroidism in dogs. Active ingredient: levothyroxine sodium.
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Based on a 15 kg dog, recommended strength: 200 mcg. 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
Chronic lifelong dosing - high cumulative vet mark-up.
Common side effects
- Signs of hyperthyroidism if overdosed
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.
Track Soloxine / Thyforon (Levothyroxine) price drops
We'll email when Soloxine / Thyforon (Levothyroxine) drops in price at any of the pharmacies above.
Stop overpaying for Soloxine / Thyforon (Levothyroxine).
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.