Radio-Iodine (I-131) Therapy

Radio-iodine (I-131) Therapy: Information

  • Subject to your Veterinarians recommendation and referral for I-131 treatment.
  • Radioactive Iodine (I-131) does not make cats feel sick!
  • I-131 is a non-painful radioisotope administered by a single injection.
  • I-131 does not damage healthy tissue and does not cause harmful side effects.
  • The radioactive iodine is transported directly into the thyroid gland upon entering the body. It remains in the thyroid for 48-72 hours, destroying the abnormal thyroid cells, thus curing the disease.
  • Colorado law mandates isolated hospitalization for a minimum of 3 days. This can be as long as 7 days.
  • Owners are not allowed to visit their cat during the isolation period.
  • While hospitalized with us, your cat will stay in our radiation “kennel”, inaccessible to cats not treated with iodine.
  • Litter is changed regularly and fresh food and water are available at all times.
  • Please inform us of any special dietary requirements so we can make their stay with us as comfortable as possible.
  • Please bring any medications your cat is currently prescribed. We will administer as directed by your referring veterinarian.

Radio-iodine (I-131) Therapy: Overview

All-inclusive package. We provide:

  • A treatment plan with a 98 percent cure rate specifically tailored to your cat.
  • Comprehensive care provided by expert staff, doctor’s daily examinations and tracking of therapy progress.
  • Veterinary technicians and their assistants feed, groom, and provide daily environmental enrichment.
  • A doctor or technician provides you with daily updates.
  • The Doctor is always available to consult with you and your referring veterinarian, during hospitalization and at any point after their discharge.
  • Minimum length of hospitalization is 3-5 days. Owners are not allowed to visit during this time.
  • Cats receiving a higher dose of I-131 may require a longer isolation period (up to 7 days). If necessary, this is provided at no additional cost.

Radio-iodine (I-131) Therapy: Long-Term Results

  • 98 percent of hyperthyroid cats are cured forever after one radio-iodine treatment!
  • 85 percent of treated cats will have a normal thyroid level within 30 days.
  • If still elevated at the 30 day recheck, no treatment is required and should be re-evaluated 60 days later.
  • Less than 2% of cats do not respond to the first radio-iodine dose.
  • If your cat is persistently hyperthyroid 3-6 months after treatment, a second I-131 administration is indicated and offered at half price.

Radio-iodine (I-131) Therapy: After Treatment/ Two week Restricted Period

  • You may elect to take your Cat home during the two week restricted period. Home care instructions will be provided.
  • Minors, pregnant women, or those with compromised immune systems may not come into contact with the cat during this period.
  • If home care is not possible, Powers Pet Emergency and Specialty offers boarding services at regular boarding fees.
  • Direct physical contact between cat and owner must be limited – two 10-minute intervals daily during the first week home, and may be increased to 20 minutes for the second week.
  • Your cat must not be allowed to sleep with anyone (human) overnight during this time.
  • Urine and feces are considered radioactive waste, and specific disposal protocols must be followed.
  • You must keep your cat indoors to eliminate risk of contaminating the environment.
  • Though human interaction must be minimal, your cat is not a danger to other feline housemates.
  • If your cat is not isolated from housemates, urine and feces from ALL cats must be considered radioactive and disposed of properly.