Radioactive iodine treatment for hyperthyroid cats | Cat Specialist Services

Radioactive iodine treatment for hyperthyroid cats

The radioactive iodine facility at Cat Specialist Services is dedicated solely to treating hyperthyroid cats with radioactive iodine (I-131). It is a purpose built facility and the only facility in Queensland designed to give cats access to sunlight and outdoor views during their hospitalisation.

Hyperthyroidism is a disorder of the thyroid gland which results in excess thyroid hormone being produced. It is the most common hormonal disorder in cats. A cancer in the gland (most commonly a benign cancer) produces the excess hormone (thyroxine) which has effects on other parts of the body such the heart and kidneys. 

Symptoms shown by cats with hyperthyroidism often develop gradually and include:

  • Weight loss (despite a good appetite)
  • Increased vocalisation
  • Behavioural changes (e.g. increased agitation) and
  • Vomiting. 

Treatment options include medications to suppress the thyroid hormone production, surgical removal of the thyroid tumour and radioactive iodine (I131- therapy) to destroy the thyroid tumour cells responsible for the hormone production.

Radioactive iodine is considered the best treatment for most cats of any age because it is simple, effective and safe. If hyperthyroidism is left untreated, symptoms can become severe and the disease can be fatal. Additionally, there is evidence to suggest that in cats that receive long term medical management (e.g. tablets) the benign tumour (thyroid adenoma) can progress to a malignant and more aggressive tumour type (thyroid carcinoma).

The radioactive iodine facility at Cat Specialist Services is dedicated to providing the best environment, care and monitoring for your cat during their radioactive iodine treatment. Our purpose built, carefully designed cat runs and caring, experienced staff will provide an enriched environment for when your cat receives treatment.


Address 1-15 Lexington Rd,
Underwood, QLD, AU, 4119

Phone07 3841 7011

Veterinary Specialist Services