Companion Animals

Companion Cat Hyperthyroidism Treatment Options

Comparing treatment options for feline hyperthyroidism including medication, radioiodine, and dietary management, with welfare considerations.

Key Facts

Hyperthyroidism is the most common endocrine disease of older cats
Untreated hyperthyroidism causes weight loss, hypertension, and cardiac disease
Radioiodine therapy is curative and considered the gold standard treatment
Methimazole controls hyperthyroidism but requires lifelong daily medication
Iodine-restricted diets can control hyperthyroidism but require strict compliance

Welfare Considerations

Hyperthyroidism causes progressive deterioration in quality of life for affected cats. The availability of curative radioiodine treatment makes this condition one of the most treatable serious diseases in older cats.

What You Can Do

Have your older cat screened annually for thyroid disease
Discuss radioiodine therapy with your vet as a curative option
Ensure cats on methimazole are monitored regularly for side effects