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Diseases and Symptoms: Hyperthyroidism

Hyperthyroidism, the overproduction of thyroid hormone, is relatively common in aging cats and may explain changes in behavior, weight loss, vomiting and diarrhea, among other signs. Findings from history, physical examination and a blood test measuring hormone levels provide veterinarians with a diagnosis. 

There are a few different treatment options available for cats with hyperthyroidism, all of which have their advantages and disadvantages.  Traditionally, the most common method for controlling hyperthyroidism is the administration of anti-thyroid medications that help to suppress the production of excessive thyroid hormone.  These medications are often effective and are relatively inexpensive, however life-long treatment is required and some cats can develop side effects.  A more definitive treatment option is also available, which involves the administration of a radioactive iodine injection to the cat. 

Hill's® Prescription Diet® y/d® Feline is the safe, effective and easy way to manage thyroid health. It can help improve thyroid health in 3 weeks when fed as the sole source of nutrition. Please consult your veterinarian for the treatment option that best suits your cat. 

Whatever therapeutic option your veterinarian chooses we recommend starting with Feline whole body support for the first 3 weeks then switch to Feline hepatic support long term to help support the whole body during times of endocrine stress.

We also recommend canine thyroid support 1/8 tsp twice daily to support and balance the thyroid gland.

To help choose the optimal supplements for your cat, please fill out the health questionnaire.