What is Thyforon (Levothyroxine Sodium) used for?

Thyforon (Levothyroxine Sodium) is a treatment for dogs with hypothyroidism.

How should I use Thyforon (Levothyroxine Sodium)?

The normal dose of Thyforon is 0.1mg (10mcg) per kg of bodyweight twice daily. This dosage may be adjusted up or down during treatment until a clinical improvement is reached. Only give your dog the dosage prescribed by your vet and only change this dosage on their instruction. Required dosages will differ between dogs depending on individual characteristics of the dog and the severity of hypothyroidism.

What are the side effects of Thyforon (Levothyroxine Sodium)?

Symptoms of osteoarthritis may worsen due to use of Levothyroxine Sodium.

Most other side effects will be similar to the symptoms of hyperthyroidism, and may indicate a dosage adjustment is necessary.

Please Note

Levothyroxine Sodium can interact unfavorably with certain drugs. If your dog is currently being treated with barbiturates, antacids, anabolic steroids, diazepam, furosemide, mitotane, phenylbutazone, phenytoin, propranolol, salicylates and sulphonamides, oestrogens, ketamine, catecholamines or sympaticomimetics, or digitalis you should advise you vet.

Dogs with hypoadrenocorticism are at a higher risk of thyrotoxicosis. Dogs with impaired heart function may be at risk of congestive heart failure when taking Thyforon.

Thyforon (Levothyroxine Sodium) must not be used in dogs with uncorrected adrenal insufficiency.