Radioactive Iodine Therapy
About Feline Hyperthyroidism
Feline hyperthyroidism is an endocrine disorder caused by a "benign goiter" of one or both thyroid
glands that causes an elevation of thyroid hormone levels. The disorder commonly affects older cats.
Iodine Therapy for Feline Hyperthyroidism
With VMRCVM's Dr. David Panciera
Download MP3 (4.6 MB, length: 9:39)
Cats suffering from feline hyperthyroidism may exhibit the following symptoms:
- eating, drinking and urinating more than normal
- weight loss
- suffering coat quality issues
- rapid toe nail growth
- elevated heart rate and other clinical signs
Radioactive Iodine Therapy Treatment
Radioactive iodine therapy is an extremely effective treatment for treating feline hyperthyroidism.
Candidates for the radioactive iodine therapy should be relatively healthy cats that have been off their
feline hyperthyroid medications for at least two weeks prior to treatment. The treatment protocol is
- Upon admission, patients are provided with a comprehensive health evaluation and a thyroid scan
to ascertain the extent of the problem and to develop a therapeutic approach.
- A low dosage of radioactive iodine is administered to the patient through a single subcutaneous
- The agent is accumulated and concentrated in the abnormal parts of the thyroid glands.The
iodine destroys the diseased tissue, while healthy thyroid tissues are not affected.
- Once the agent is injected, the patient must be kept in isolation for three or four days while the
radioactive agent is cleared from the body.
Scheduling an Appointment for Radioactive Iodine Therapy
To schedule an appointment for this service at the VTH, please consult with your primary care veterinarian to
arrange a referral to our hospital for your feline companion.
Steps for the primary care veterinarian:
- Call the Small Animal Hospital at (540) 231-4621 to arrange the referral.
- Complete the VTH Referral Form.
- Fax the completed referral form to (540) 231-9354 or send the original referral form with
the client at the scheduled appointment time.
We are especially grateful to the late Joanne O’Brien whose generous gift enabled the renovation of
our animal holding and treatment facilities to support the operation of the radioactive iodine therapy