Hyperthyroidism Booklet

05 How is hyperthyroidism treated? Hyperthyroidism is readily treatable and there are currently four main treatment options. A patient will normally be stabilised on medication or diet first before the other options are considered. Surgical thyroidectomy An operation can be performed to remove the enlarged thyroid gland, and this treatment usually leads to a permanent cure. Sometimes a second surgery to remove the other gland is needed later in life. Medication Anti-thyroid drugs can be given daily, in either liquid or tablet form, to reduce the production and release of thyroid hormone from the thyroid gland. These are either used to stabilise the condition for the rest of the cat’s life or, in the short term, to control the signs and reduce the risk of complications before surgical or radioactive treatment (see below). If you choose to treat your cat with daily medication for life, your vet will ask you to come in for regular check-ups and blood tests to monitor the response to treatment, adjust the dose if needed and identify any other problems. This is likely to be three weeks after starting the medication or any dose change. Will this cure the condition? No. Daily medication is required. Possible side effects Side effects are uncommon but possible, including white blood cell suppression, itchy skin and liver changes. These should be discussed with your vet. Disadvantages Daily or twice daily tableting, or daily oral (liquid) solution, plus regular check-ups and blood tests are needed. Will this cure the condition? Yes (in the majority of cases, but it may not be effective if there is additional thyroid tissue elsewhere in the body). Possible side effects Calcium control can become a problem, which may require medication. Disadvantages There are some risks involved with general anaesthetic and surgery, which your vet will discuss with you.