Hyperthyroidism Booklet

06 Radioactive Iodine therapy This has the advantage of a high cure rate (95-99% of cases), without the need for anaesthetic, and can treat cats with thyroid tissue which is not situated in the normal position of the neck. Carried out by a referral veterinary hospital, a single injection is required and works by selectively destroying the excess thyroid tissue and therefore reducing hormone levels. However, a treated cat will remain radioactive for a period of time following the injection and must therefore stay in hospital for one to two weeks following treatment. Life expectancy has been shown to be better with this treatment than medication. Iodine restricted prescription diet A special diet that has been developed to limit your cat’s iodine intake, which may be suitable in some cases. It is also formulated to support the heart and kidneys. No other food, titbits or treats can be fed as this will negate the beneficial effect of the diet, so it is most suitable for indoor cats. For most cats diagnosed with hyperthyroidism disease the condition can be managed to allow them a good quality of life for several years, and is potentially curable. Please discuss any concerns you have with your vet so that a treatment plan can be arranged to suit both you and your pet. Will this cure the condition? Yes. Possible side effects Minimal. Disadvantages The initial cost is greater than alternative treatments, with a stay in hospital and, very occasionally, a second injection may be needed. Will this cure the condition? No. It will be a lifelong diet. Possible side effects Minimal. Disadvantages Indoor cats only and not ideal for fussy eaters. For cats under 12 years of age the recommendation would usually be surgery or radio-active iodine. For cats over 15 years of age, diet or medication is usually recommended.