Addison’s Disease

Addison’s disease is a rare endocrine disorder that occurs when the adrenal glands (small glands located above the kidneys) do not produce enough of certain hormones, primarily cortisol and often aldosterone.Cause: In over 80% of cases, the cause is autoimmune – the immune system mistakenly attacks and destroys the adrenal gland tissue.Other Causes: Less commonly, it can be caused by infections (such as tuberculosis), cancer, bleeding into the glands, or the use of certain medications.

Function of Hormones:

Cortisol (“stress hormone”) helps the body respond to stress, regulate metabolism, blood pressure, and reduce inflammation.Aldosterone regulates sodium and potassium levels in the blood, which is vital for maintaining blood pressure and fluid-electrolyte balance.

• Development: The disease usually develops slowly, with progressive damage to the adrenal glands.

Symptoms

Symptoms are often non-specific and may be mistaken for other conditions, especially in the early stages. They worsen over time:

Gradually Developing Symptoms:

• Chronic fatigue and muscle weakness that do not improve with rest.
• Weight loss and reduced appetite.
• Hyperpigmentation of the skin (darker patches) – especially on skin folds, gums, scars, and sun-exposed areas. This is a classic symptom caused by the elevation of the hormone ACTH (Adrenocorticotropic Hormone).
• Low blood pressure (hypotension), which worsens upon standing (orthostatic hypotension).
• Gastrointestinal problems: nausea, vomiting, diarrhea, or abdominal pain.
• Craving for salt or salty foods (due to the lack of aldosterone).
• Mood changes: depression, irritability, lack of concentration.

Treatment

Addison’s disease is a chronic condition that cannot be cured, but it can be successfully managed with hormone replacement therapy.Hormone Replacement TherapyTreatment involves taking synthetic hormones to replace the missing ones:

• For Cortisol (Glucocorticoid): Hydrocortisone (most commonly), Prednisone, or Dexamethasone is taken. The dose is distributed throughout the day to mimic the body’s natural cortisol production.
• For Aldosterone (Mineralocorticoid): Fludrocortisone is taken. This medication helps maintain adequate sodium levels and blood pressure.

Monitoring and Follow-Up

• Regular blood tests to monitor sodium, potassium, and hormone levels.
• Frequent check-ups with an endocrinologist for dose adjustments and evaluation of overall condition.

Other Important Aspects

Diagnosis: Established through blood tests to measure cortisol, ACTH, sodium, and potassium levels, as well as an ACTH stimulation test (Synacthen test), which is the primary method for confirming the diagnosis.Prognosis: With proper and timely treatment, people with Addison’s Disease can lead normal and fulfilling lives. The key is strict adherence to replacement therapy and effective management of stressful situations.

 Synonyms: Autoimmune disease, Hypoadrenocorticism, Bronze disease