Hyperthyroidism is the most common hormonal disorder in older cats and effective management significantly improves their comfort and longevity.
Hyperthyroid cats experience significant physical distress including restlessness, rapid heart rate, muscle weakness, and gastrointestinal upset. Early diagnosis and appropriate treatment dramatically improve quality of life. The choice of treatment depends on the cat overall health, owner capability, and access to specialized care. Methimazole medication is accessible and affordable but requires lifelong administration. Radioactive iodine, while initially expensive, often provides the best long-term outcome. Monitoring for concurrent kidney disease after treatment is critical to avoid unmasking renal failure.