Radioactive iodine treatment offers a curative, single-dose option for feline hyperthyroidism. Understanding the process helps owners make informed treatment choices.
Hyperthyroid cats experience significant welfare compromise from the metabolic effects of excess thyroid hormone — weight loss, cardiac hypertrophy, hypertension and gastrointestinal disturbance. Radioactive iodine is the most definitive treatment but requires a hospital stay that is stressful for many cats. Isolation facilities should provide appropriate environmental enrichment and owner-provided bedding with familiar scents. Post-treatment monitoring for hypothyroidism and renal function is essential as kidney disease unmasked after treatment requires management.