Companion Animals

Companion Cat Hyperthyroidism Treatment Options

Feline hyperthyroidism is the most common endocrine disorder of older cats, and understanding treatment options helps owners make the best welfare decision.

Key Facts

Hyperthyroidism affects around 10% of cats over 10 years of age
Untreated hyperthyroidism causes cardiac stress, weight loss, and hypertension
Radioactive iodine therapy provides a permanent cure in over 95% of cases
Daily oral medication controls the condition but requires lifelong compliance
Low-iodine prescription diets are an option for cats that cannot tolerate other treatments

Welfare Considerations

Untreated feline hyperthyroidism causes progressive suffering. Radioactive iodine is the most effective long-term welfare option, though it requires specialist referral. Whatever treatment is chosen, regular monitoring is essential to confirm adequate control.

What You Can Do

Attend annual wellness checks for cats over 8 years
Discuss radioactive iodine therapy with your vet if hyperthyroidism is diagnosed
Monitor treated cats for signs of recurrence