Radioactive iodine treatment

Radioactive iodine treatment is a highly effective and specialised treatment used to treat feline hyperthyroidism in cats. Hyperthyroidism is common in older cats and can significantly affect weight, appetite, heart health, and overall well-being if left untreated.

This advanced treatment specifically targets abnormal thyroid tissue while preserving healthy cells, helping to restore normal thyroid function and improve long‑term health and quality of your cat's life.

Radioactive iodine treatment is administered as a single injection just under the skin, similar to a routine vaccination. The iodine is then absorbed into the bloodstream and naturally concentrates in the thyroid gland.

The radioactive iodine selectively destroys the overactive thyroid tissue without affecting surrounding organs. It targets the problem at its core, which is why the treatment is considered a gentle, precise, and curative option for many cats.

For many cats, radioactive iodine eliminates the need for lifelong daily medication or invasive thyroid surgery. Following treatment, cats are required to stay in hospital for a period of time while radiation levels reduce and they can be safely discharged home.

Recovery following radioactive iodine treatment is generally straightforward and well-tolerated. Once your cat returns home, temporary precautions may be required, including keeping them indoors and limiting close contact with children for a short period. Your veterinary team will explain any aftercare requirements in full before discharge.