Radioiodine Therapy

Iodine-131 Treatment for Feline Hyperthyroidism — A One Shot Deal!


We don’t use the word breakthrough lightly. But consider the following facts about Radioiodine treatment:

  • It’s the only method that consistently eliminates thyroid tumors — for good.
  • It’s more cost-effective than drugs or surgery.
  • There are no harmful side effects.
  • There is no tissue or organ damage – including the parathyroid glands.
  • There is no damage to healthy thyroid tissue.
  • There is no anesthesia required.
  • There is no daily pilling.
  • It destroys thyroid tumors wherever they are located.
  • It returns thyroid function to normal usually within one month.
  • Experts agree – it’s the treatment of choice.

Now compare that with these facts about your past options – medical and surgical therapies:

Radiocat has treated over 50,000 cats successfully. More than any other provider in the world. Here's why.


Medical Therapy:

  • Does not cure the disease or kill the thyroid tumors; in fact, the tumor can keep growing, making medical management less and less effective.
  • Causes harmful side effects like nausea, vomiting, lethargy, lack of appetite and hair loss/facial scabbing.
  • Causes loss of vital white blood cells and blood clotting abilities.
  • Causes long-term damage to liver and kidneys.
  • Damages owner-pet relationship by requiring pilling, 1-3 times daily.
  • Increases the need for blood tests to monitor thyroid hormone levels and potential side effects.
  • Costs $500-$700 per year, for the rest of your cat's life.

Surgical Therapy:

  • Requires anesthesia.
  • May damage parathyroid glands.
  • Creates difficulty in identifying/removing the entire tumor.
  • Leads to persistence of Hyperthyroidism post-surgery (80% of cases already have another tumor on the opposite side that will become clinically significant within 1.5 years).
  • Costs $700-$1300 for one surgery.
  • Is often performed in two surgeries.
  • Leaves thyroid tissue in the chest where the tumor can recur.
  • Leaves many cats still needing I-131 therapy, even after undergoing one or more surgeries.

As you can see, Radioiodine therapy is the clear treatment of choice and the only consistent cure for Feline Hyperthyroidism.



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