Vet prescription required in checkout

Thyforon 400 (0.4mg)

Vet prescription required in checkout

Thyforon 400 (0.4mg)

Thyforon is for the treatment for hypothyroidism in dogs.
Standard Retail Price £0.00
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  • Service Reviews (64184)

Thyforon 400 (0.4mg)

Thyforon 400 (0.4mg) is a flavoured tablet and is for the treatment for hypothyroidism in dogs.

It is supplied in 400mg tablets, either as packs of 10 tablets or packs of 250.

Thyforon is also available in 0.2mg and 0.8mg. The active ingredient is Levothyroxine Sodium which is a synthetic version of the thyroid hormone, Thyroxine.

Hypothyroidism is a common disease in dogs and is when the thyroid does not produce enough hormones (under-active thyroid). The thyroid gland is a small gland situated close the larynx (voice box) in the neck. The main function of the thyroid gland is to regulate metabolism by producing thyroid hormones.

The disorder normally affects mid to large breed dogs between the ages of 4-10 years. It is also more common in dogs that are neutered.

If you are concerned, please always speak to your Vet. Appropriate tests will be taken out to formally diagnose.

Always wash hands after administering the product.

If pregnant, always handle with caution.

This is a prescription item and will be sent once a valid prescription is received.


If you see the "prescription required" sign next to an item you’d like to order, it means the item can only be issued with a prescription. While you can add these items to your shopping cart and pay for them along with other non-prescription products, we can’t dispatch them until we’ve received a prescription.

Delivery Info

Light (usually non-food) orders under £29 are charged £2.99 postage. Heavy (typically food) orders under £29 are charged £4.49 postage.

For Light items (under 2kg) our standard method is Royal Mail Second Class (there are a few exceptions, so if in doubt check our Delivery page).

To get it faster you can upgrade Light items to Royal Mail 1st Class or a Guaranteed Next Day Courier service, Saturday Courier or even before 12 noon services. There's a small fee, but if you're in a hurry they are worth considering. To qualify for next working day delivery, orders must be placed before 12 Noon Monday to Thursday. There is no standard Saturday courier delivery.

Heavy items weighing 2kg and more are sent via courier. If ordered before noon Monday to Thursday, Heavy items will be delivered next working day. Heavy items ordered after 12 Noon Friday, or anytime Saturday and Sunday will dispatched on Monday for a Tuesday delivery.

Please note that if you are purchasing a mix of Light and Heavy items at the same time, these will be sent separately. The Heavy items being sent by Courier, the Light items by Royal Mail Second Class.

Refrigerated items are only despatched by courier Monday to Thursday to ensure the item remains cool.

All exceptions to these guidelines are noted in the product description.

For more information, view our Delivery page.

Service Reviews (64184)
Independent Customer Feedback

Thyforon 400 (0.4mg)

4.9/ 5
(64184 customer reviews)
  1. 5
    "Tried lots of different products previously this is the only thing that works. Fast delivery and good price too"
    Review by / (Posted on
  2. 5
    "Very pleased with service received and cost of items compared to what vet would be charging.Would definitely reccomend the Company."
    Review by Jeanette Thomas / (Posted on
  3. 5
    "Clear and concise instructions , good to have a telephone number in the event of a problem or query . Excellent and rapid service , particularly prompt with accurate delivery times when using the following day Courier Service (well worth the small additional cost) . Our sincere thanks ."
    Review by John Davies / (Posted on
  4. 5
    "Easy to use registration and ordering system, good communication regarding delivery progress, very competitive pricing, will be using again."
    Review by / (Posted on
  5. 5
    "Came very quick good service"
    Review by / (Posted on
View all 64184 customer reviews

Vet prescription required in checkout

  1. Get a prescription from your vet
  2. Place your order with us
  3. Add a prescription and tell us about your pet.
  4. Our vets will double check your order & your order is dispatched right away
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