Radiocat I-131 Treatment

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  • Dr. David S. Herring is a board-certified Veterinary Radiologist who believes the pet’s best interests are paramount and that the treatment should never be worse than the disease. He received advanced training in diagnostic ultrasound, echocardiography, radiography and nuclear medicine, and taught at Texas A&M and The Ohio State University. In 1985, he moved to the Baltimore-Washington area, where he became the first veterinarian to offer abdominal ultrasound and, in 1995, radioiodine therapy (I-131).

  • Dr. Rand S. Wachsstock is a graduate of The University of Illinois. Dr. Wachsstock taught both there and at Yale University. He has actively practiced emergency medicine since 1984 and believes comprehensive state-of-the-art medical care should be readily available to all pets. He owns and operates The Emergency/Critical Care Service at The Regional Veterinary Referral Center in Springfield, Virginia. In 2005 he was appointed by the Governor of the Commonwealth of Virginia to the Radiation Advisory Board and in 2011 to the Task Force on Lyme Disease.Dr. Herring and Dr. Wachsstock are co-founders of Radiocat, a veterinary practice dedicated exclusively to the care and treatment of feline hyperthyroidism.



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.

Now compare that with these facts about your past options – medical and surgical therapies: Radiocat has treated over 74,000 cats successfully. More than any other provider in the world. Here’s why.


Destroys all the thyroid tumor wherever it is
Cost effective
No harmful side effects
Requires anesthesia (Increased risk)
Possible post-operative complications
After multiple surgeries may require I-131
Requires Daily Pilling
Can have harmful side effects
Can become ineffective over time
Does not stop tumor growth
Requires repeated blood work
Unproven over time
Cannot supplement diet with any treats or other foods
Inappropriate for outdoor cats or multiple cat households


  • 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 $250-$700 per year, for the rest of your cat’s life.

    • 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 $1500-$2000 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.