Hyperthyroidism is a common condition in elderly cats.   Several different types of treatment are available, including daily tablets and topical medicated gels, to manage the condition through to radioactive iodine treatment.

Radioactive iodine has become a preferred treatment for hyperthyroidism.  This treatment is normally curative, and involves a single injection of the Radioactive Iodine, then a period of isolation while radiation levels fall.  Ongoing treatment is generally then not required.

At the Vets has a radiation-isolation facility for treating and housing cats during the post-treatment period.