Hyperthyroidism in Cats - Symptoms, Diagnosis & Treatment Options

What is Feline Hyperthyroidism?

Feline hyperthyroidism occurs when the thyroid overproduces hormone. Common in older cats (8-10+ years). Proper treatment extends lifespan.

Hyperthyroidism

Symptoms

• Weight loss despite increased appetite
• Hyperactivity, anxiety
• Rapid heart rate (heart murmur)
• Frequent urination, increased thirst

Diagnosis

Blood tests measure T4 levels. Ultrasound checks thyroid size.

Treatment Options

• Medication (methimazole): Lifelong treatment
• Radioactive iodine: Possible cure (expensive)
• Surgery (thyroidectomy): Alternative option
• Special diet (iodine-restricted food)

Medication Management

Methimazole has side effects (low blood counts, liver damage). Regular blood tests are essential.

Sources & References

• Cornell Feline Health Center - Hyperthyroidism

Early diagnosis and treatment greatly improve quality of life.