Care and Treatment of an Addison's Disease Dog Patient


"A diagnosis of Addisons disease dog (called hypoadrenocorticism) occurs when the adrenal glands are not functioning properly (they aren't producing enough corticosteroids or mineralcorticoids).

These glands, located near the kidneys, have a role in regulating the way a dog's body controls levels of water, sugar and salt. Times when your dog is under stress is when signs of Addisons Disease in Dogs often occur. This is because the adrenal glands produce the hormone cortisol when stressed. Under production of cortisol results in canine addisons symptoms such as dehydration, a change in heart rate (slow, irregular), weakness and signs of depression.

Dogs are treated in the short term to bring the body back into balance with the use of intravenous fluids and medications which replace missing cortisol. Longer term pills administered daily or a monthly injection can help a dog with Addisions live a healthy life. Natural remedies can be used as a supportive therapy to help the body regulate itself. This condition is the opposite of the more common Cushing's Disease, where too much cortisol is produced."

Great Dane with symptoms such as cough, vomiting and lack of appetite. Diagnosed with an abnormal enlargement of the esophagus resulting from hypoadrenocorticism (canine Addisons disease). The patient was treated with Prednisone and mineralcorticoids and responded well to treatment.


If you are in the Veterinarian’s office and the diagnosis is the endocrine disorder Addisons disease dog. Don’t panic. Although serious, this disease can be treated and your dog can return to normal activity.

addisons disease dog

Peke-a-Poo age 2-1/2 with Addisons.
Symptoms included appetite loss and lack of energy. Originally diagnosed with Hypoglycemia, but only showed a mild response to therapy.

After being treated with medications for Addison's, patient showed
dramatic improvement including energy levels and appetite.

Canine Addison's disease (hypoadrenocorticism) occurs when your dog's adrenal glands (each kidney has one gland) stops producing the hormones (cortisol and aldestorone) necessary to regulate sodium in the blood. Without these hormones, sodium levels decline causing an increase potassium and lower blood pressure.

The problem is that the higher levels of potassium stop the heart from beating faster, which it would naturally do, such as when there is a loss of blood pressure. With a lower heart rate and lower blood pressure your dog could go into shock (called Addison’s crisis). This could be fatal.

This disease is the opposite of the more common dog adrenal gland problem Canine Cushings disease where too much cortisol is produced.

Dog Age and Breeds Susceptible to Addison's

Addison's disease is most common in young to middle-aged female dogs (between age 1 and 12, mean age is 4). Breeds with an above average incidence of disease are:

  • Standard Poodles
  • West Highland White Terriers
  • Wheaten terriers
  • Great Danes
  • Rottweilers
  • Portuguese Water Dogs
  • Leonbergers
  • Bearded Collies

The most common type of dog with the disease are mixed breeds.

6 year old SF Blue Heeler breed.
Suffered acute renal failure (kidney disease) before being diagnosed. Medical conditions such as Azotemia (urea in the blood) caused injury to the kidney's.

If kidneys are not damaged, condition responds to fluid therapy.

Systems Affected by Addison's In Dogs

Several systems are affected by Addison's disease in dogs:

  • Cardio
  • Gastrointestinal/Digestive
  • Musculoskeletal
  • Urologic/Renal
  • Skin

Types of Addison's Disease Dogs

There are three kinds of Canine Addison’s disease called primary, secondary and atypical.

  • Primary: When the adrenal glands fail to produce both mineralcorteriods and glucococosteriods. Requires the replacement therapy of mineralocortioids.
  • Secondary: When the pituitary gland does not secrete ACTH, a hormone necessary to stimulate the adrenal glands. Requires replacement therapy of glucocorticoids.
  • Atypical: When there is immune system related damage to the adrenal glands. Without treatment can become primary Addison's. Requires replacement therapy of glucocorticoids.
poodle with dog addisons

Poodle with symptoms such as vomiting, weight loss and drinking excessive water.

Diagnosed with hypercalcemia (high levels of calcium in the blood, a condition seen in 1/3 of dogs with Addison's. Dogs treated with glucocorticoid therapy respond well.

Causes of Hypoadrenocorticism

Addison’s can be caused by diseases that affect the functioning of the adrenal gland. This includes toxic drugs, infections and tumors. Sometimes if steroids are used to treat another illness, it can cause the adrenal gland to temporarily stop functioning, inducing Addison's disease.

Addison's Symptoms in Dogs

Symptoms of Addison's disease dog can be mild to severe. The number of organs involved and the severity of symptoms vary from patient to patient.

Addison's disease symptoms cause a dog to appear weak and lethargic. Vomiting and diarrhea are common. Other symptoms include reduced appetite, tremors, shaking, muscle weakness and pain in the hind quarters. Symptoms such as shivering, sharking or the dog appearing to be cold are less common.

If your dog collapses for no apparent reason, Addisons disease dog is one of the prime considerations.

In severe cases, dogs can have irregular heart beats and can go into shock.

The veterinarian will observe symptoms such as dehydration, a slow heart rate, weak pulse, pain in the abdomen and hair loss.

Gastrointestinal and renal symptoms are similar to other diseases that need to be ruled out before an Addison's diagnosis can be confirmed.

dog with addisons disease

Rat Terrier dog diagnosed with Addison's after symptoms such as diarrhea and vomiting. Initial treatment for gastrointestinal disease resulted in diarrhea with strong smell. X-rays showed no obstruction in abdomen.

Treatment for Addison's resulted in improvement including resolution for diarrhea and improvement in appetite after 2 days.

Diagnostic Tests

Your Veterinarian will do a heart EKG to see if the heart has slowed down or if your dog’s natural pace maker isn’t working. As indicated above, if blood tests show lower sodium levels and higher potassium levels, there is a high likelihood of Addison's. Your Vet may also administer a ACTH test (measures adrenal gland function).

Diagnosing canine Addison's disease can be tricky, since the symptoms are rather vague and can be symptoms of so many other illnesses. It is also an uncommon ailment in dogs. When your dog doesn't respond to other treatments, however, your vet will do some blood tests and will notice abnormal sodium and potassium levels in the blood.

Addison's disease can sometimes look like kidney disease, liver or heart disease. Even the blood work can look like kidney disease. So when Addison's disease is suspected, an ACTH response test will be done. The administration of this hormone should stimulate the production of adrenal hormones. If it doesn't, then Addison's disease is present.

The disease can also be triggered by corticosteroids that may have been administered to treat a different disease. Since this substance is made by the adrenal glands, the glands stop producing more.

Approximately 20% - 25% of dogs with Addison's are hypoglycemic.

Treatment for Canine Addison's Disease

Sudden onset of Addison's disease in dogs, referred to as a Addisonian crisis, is considered a medical emergency. The veterinarian will treat the patient with fluid therapy.

There are several drugs available to help replace the missing hormones from your dog's body. Examples include Percorten V produced by Novartis and Florinef. Percorten replaces the Aldosterone that the adrenal glands do not make. It is an injection given approximately every 28 days. It is given in combination with Prednisone, a steroid that is given to dogs with Addison's to replace the cortisol that they are not producing.

Treatment for Addision's disease costs approximately $30 per month (U.S.$, $37/month Canadian).

Dogs respond well to treatment, with a response to therapy in 24-48 hours. You will need to pay close attention to your dog. If you notice changes in his appetite or any vomiting or diarrhea or other signs of illness, let your vet know right away. With proper care and monitoring, the prognosis for dogs with Addison's disease is good.

A dog might require hormonal replacement therapy for life.

Diet for Dogs With Addison's

When your Addison's disease dog has health problems it is a good idea in general to examine their diet to ensure they are getting the vitamins and nutrition they need. In most cases dietary change is not necessary.

The Association of American Feed Control Officials (AAFCO) is the organization that sets commercial standards for dog food in the United States. Only buy dog food that has the following statement on the bag: “Animal Feeding Tests using AAFCO procedures substantiate that (name of brand) provides complete and balanced nutrition for the growth of dogs”.

If the AAFCO statement is on the bag, the nutritional balance is probably somewhat similar from brand to brand. The key to the statement is “animal feeding tests” which means that the food was tested on dogs over several months and is a commitment to high standards.

For cases of Addison disease in your dog you may want to go beyond the AAFCO standard. This is because AAFCO foods can contain meat by products such as lungs, spleen and kidneys. Not what I want to feed my dog.

If you want to avoid “meat-by-products” you can look for labels that state the ingredients are human grade.

Use of Herbs and Natural Remedies for Canine Addison’s Disease

Herbal products are never considered to be a specific treatment, such as a replacement for a prescription medications that provide a cure. They are supportive, in that they contain ingredients that naturally strengthen the body's own defense or help to restore normal function. This can reduce the severity of symptoms and help to protect a dog against the worsening of a disease. One supplement to consider that is made specifically for Addison's is PetAlive Cushex. Be sure to discuss this and other herbal remedies you might find with your veterinarian.

A rule of thumb for determining the right dose is to take your dogs weight and divide it by 150 (called Clarke’s rule). Multiply this percentage by the adult dose of the herb. Herbs can be mixed into dog food or can be turned into a tea for your dog to drink. Always use the manufacturers directions as the best source of information.

Many of the following herbs are helpful in Dogs with Addision's disease. Many are are found in Cushex or can be purchased individually:

  • Licorice: This herb interacts and prolongs the effectiveness of corticosterods, the very substance Addison's disease dog need. It has an ACTH-like action on the adrenal cortex, increasing the production of glucose and mineralocorticoids
  • Milk Thistle: Supports the immune system as an antioxidant.
  • Slippery Elm: Used as a natural treatment for diarrhea
  • Ginger: Thought to strengthen steroid production
  • Garlic: Helps strengthen the heart and reduces blood pressure
  • Valerian: Beneficial effect on the heart and blood pressure
  • Taraxacum officinale (Dandelion): Helps the liver, kidneys and adrenal glands. Promotes adrenal function.
  • Arctium laps (Burdock): Detoxifies tissues
  • Astragalus membranaceous (Huang Qi): Helps to restore balance to the adrenal glands.
  • Arsenicum (30C): Helps with normal urination and thirst levels.

The good new is that with treatment for Addison's disease your dog will live a long and healthy life.

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References for Canine Addison's Disease

American College of Veterinary Medicine

Addison's Disease- Is It Always Acute?
Mooney, Carmel T.

Addison's Disease, "The Great Pretender"
Bount, Wendy, DVM

Brevitz, Betsy D.V.M – Hound Health Handbook

Griffin, James M. – Dog Owners Home Veterinary Handbook

Washington State University