Radioiodine I-131

Treatment of Feline Hyperthyroidism

What is hyperthyroidism?

Cats have a gland called the thyroid which, as with humans, regulates their metabolic rate. Hyperthyroidism occurs when this gland develops a tumor (98% are benign) that causes an overproduction of thyroid hormone (thus the term “hyper” thyroidism). This condition over-stimulates many organ systems, and causes abnormalities including changes in behavior, decreased or excessive appetite, hyperactivity or lethargy, weight loss, fever, rapid heartbeat, increased water consumption and litter box output, shedding of fur and diarrhea.

If left untreated, hyperthyroidism can be fatal.

Radioiodine (I-131) treatment can completely cure hyperthyroidism by destroying only the thyroid tumor. Over 94% of all cats treated never need future treatment. The treatment is simple, a single injection.

Your cat will need to stay with us for two days post-treatment (required by law), but will receive plenty of love and care. The thyroid function should return to normal within four weeks. The radioiodine should not affect normal thyroid tissue and should produce no harmful side effects.

Our therapy is all inclusive and covers: physical examination, discussion of therapy options, interpretation of X-rays, abdominal and cardiac ultrasound (to verify that your cat is an appropriate candidate for treatment), radioiodine, hospitalization, patient pampering (background music, meals catered to your request, and plenty of loving care), general health and radiation monitoring and daily updates.

Post treatment test results are reviewed and discussed with you and your referring veterinarian.