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What's the life expectancy for older dogs with Addison's disease?

Updated On September 23rd, 2025

Pet's info: Dog | Rat Terrier | Female | spayed | 12 years and 4 months old | 18 lbs

Can older dogs with Addison Disease be cured and have a chance of living a longer life as younger dogs diagnosed with Addison? I have a 13 year of Rat Terrier, I was told on Friday that she has Addison disease. I'm trying to get enough money for the test and IV her vet want to administer.

1 Answer

Most Helpful Answer

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Answered By Jenna Beyer, DVM, MBA, cVMA

Veterinarian, Certified Veterinary Acupuncturist

Published on October 15th, 2017

Addison's Disease cannot be cured, but it can often be managed with life-long medications. It does usually require frequent vet visits for monitoring in the future. However, it can be life-threatening if a dog is sick when it is first diagnosed (or the suspected diagnosis). Without aggressive treatment, dogs can easily die from dehydration and shock caused by the effects on their fluid volume. Here is a great article on Addison's Disease and what to expect from diagnosis and treatment: http://www.veterinarypartner.com/Content.plx?P=A&S=0&C=0&A=608

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