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Treatment for Feline Hyperthyroidism

Hyperthyroidism Is the Most Common Endocrine Disorder of the Cat

A cat's thyroid glands – they have two in their necks -- produce hormones that regulate their body's metabolism. Hyperthyroidism in cats results from over activity of one or both of the glands. The most common cause of feline hyperthyroidism is a benign tumor known as an adenoma in the thyroid gland. Still, in many cases, the exact cause can sometimes be difficult to determine. Hyperthyroidism occurs in middle-aged to old cats with no predilection for breed or sex.

Symptoms May Vary From Extremely Mild to Severe

The most common signs are weight loss, hyperactivity, and increased appetite. Increased water consumption and urination may also be symptoms -- thought to result from an increased blood flow to the kidneys. Intermittent vomiting and diarrhea can be frequent, as can Increased heart rate, arrhythmias and congestive heart failure. Most cats with hyperthyroidism develop a reversible form of heart disease with congestive heart failure. In an unusual form, apathetic hyperthyroidism, depression and loss of appetite replace hyperactivity and increased appetite. Weight loss may progress more quickly in these cats.

Compounding Solutions from MYERS Medical

Commercially available medication is available in tablet form – a delivery mechanism that can be difficult to apply. We prepare both topical cream and oral liquid suspension treatment forms that make it easier on you and your cat. The primary ingredient we use is Methimazole.

An enzyme (peroxidase) produces thyroid hormones (thyroxine [T4] and triiodothyronine [T3], by combining iodine with a protein called thyroglobulin.

Methimazole prevents iodine and the peroxidase enzyme from interacting with thyroglobulin to form the T4 and T3 thyroid hormones, decreasing thyroid hormone production. The drug also interferes with conversion of T4 to T3, which is the more potent of the thyroid hormones.

If you have a question about this condition or any of the medications available to treat it, please feel free to use the "Email Us" button at the top of the page, or call us.

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