Levothyroxine for Dogs
Levothyroxine for dogs treats the signs of hypothyroidism . Learn more about the drug's side effects and the importance of dose monitoring.
Synthetic levothyroxine is the treatment of choice for hypothyroidism . Its administration orally should result in normal serum concentrations of T 4, T 3, and TSH, which attests to the fact that these products can be converted to the more metabolically active T 3 by peripheral tissues. A sodium levothyroxine product approved for use in dogs is recommended. Liquid and tablet formulations are ...
Key Details About Dog Hypothyroidism Levothyroxine
What is levothyroxine ? Levothyroxine (brand names: Thyro-Tabs Canine®, Synthroid®, Levothroid®, Levoxyl®, Unithroid®, Levo-T®, Eltroxin®, PMSLevothyroxine®) is a thyroid hormone replacement used to treat hypothyroidism (low thyroid hormone levels). Its use in cats to treat hypothyroidism is "off label" or "extra label". Use of the human version of this drug to treat dogs or ...
The standard treatment for hypothyroidism is daily oral administration of the synthetic thyroid hormone levothyroxine , which is the thyroid hormone replacement compound of choice in dogs and cats.
Useful Notes on Dog Hypothyroidism Levothyroxine
The thyroid hormone represents the volume dial on one's metabolism. Too many calories are burned too fast, with subsequent heart disease not far away. Too little and the body loses energy, cannot function properly, and symptoms arise in multiple organ systems. Hypothyroidism is a classically described hormone imbalance, both in people and in dogs .
Thyroid autoantibodies (indicates a hereditary origin) How is it treated? Your veterinarian will prescribe a synthetic thyroid hormone called levothyroxine . It is usually given twice daily, but some dogs will do well with once daily administration. This medication will need to be given for the rest of your dog's life.
Canine Hypothyroidism Therapy
Clinical Tips Certain breeds and active working dogs are known to have thyroid hormone concentrations that are below standard laboratory reference ranges in the absence of thyroid disease. Therefore, it is essential to consider the patient's breed and purpose when presented with abnormal thyroid hormone concentration results. This is especially important in sighthounds, such as greyhounds or ...
Hypothyroidism is a common endocrine disease of dogs . It occurs when the thyroid glands fail to produce adequate amounts of the hormones thyroxine (T4) and triiodothyronine (T3). Primary hypothyroidism resulting from idiopathic thyroid gland atrophy or immune-mediated lymphocytic thyroiditis is the most common diagnosis.
Hypothyroidism in Dogs
Hypothyroidism is an abnormality of the thyroid gland leading to a reduction in the dog's metabolic state. This can cause many systemic changes including weight gain, hair loss, lethargy, and susceptibility to infections - most noticeably of the skin and ears. Diagnosis is made by a series of blood tests. Treatment is oral thyroid hormone replacement and is lifelong. Clinical signs and ...
This comprehensive guide helps you understand Thyro‑Tabs® — levothyroxine sodium—a synthetic thyroid hormone used daily in 2025 to treat canine hypothyroidism and occasionally off‑label in cats.