Adrenal Insufficiency (Addison’s Disease)

Overview

Adrenal insufficiency, commonly known as Addison’s disease, is a rare disorder in which the adrenal glands do not produce enough of the hormones cortisol and, in many cases, aldosterone. Cortisol helps the body respond to stress, maintain blood sugar, and regulate metabolism, while aldosterone controls sodium and potassium balance and blood pressure. The condition can be primary (damage to the adrenal glands themselves) or secondary (insufficient stimulation of the glands by the pituitary hormone ACTH). Most cases of primary adrenal insufficiency are autoimmune, but infections, hemorrhage, or metastatic cancer can also be causes.^[1][2]

Symptoms Checklist

Typical manifestations develop gradually and may be subtle at first. Check any symptoms you have experienced:

• Chronic fatigue or weakness
• Unexplained weight loss
• Loss of appetite
• Low blood pressure, especially when standing (orthostatic hypotension)
• Darkening of the skin (hyperpigmentation), especially on scars, elbows, knees, and mucous membranes
• Salt craving
• Muscle or joint pains
• Abdominal, pelvic, or lower back pain
• Nausea, vomiting, or diarrhea
• Low blood sugar (hypoglycemia)
• Irritability or depression
• Irregular menstrual periods in women

Sources: Mayo Clinic, CDC

Risk Factors

• Autoimmune disorders (e.g., type 1 diabetes, Hashimoto’s thyroiditis, vitiligo)
• Family history of Addison’s disease or other autoimmune conditions
• Certain infections: tuberculosis, HIV, fungal infections, or water‑pipe (coccidioidomycosis)
• Adrenal hemorrhage or infarction (e.g., due to anticoagulant therapy, severe sepsis, or trauma)
• Use of long‑term high‑dose glucocorticoids that suppress the hypothalamic‑pituitary‑adrenal (HPA) axis
• Age: most commonly diagnosed in adults aged 30‑50, but can occur at any age

Source: NIH

Diagnosis

Diagnosing adrenal insufficiency involves a combination of clinical assessment, laboratory testing, and sometimes imaging.

1. Baseline hormone levels: Early morning serum cortisol and ACTH. Low cortisol with high ACTH suggests primary disease; low cortisol with low/normal ACTH suggests secondary.
2. ACTH (Cosyntropin) Stimulation Test: Synthetic ACTH is administered intravenously or intramuscularly; cortisol is measured at 0, 30, and 60 minutes. A rise to < 18 µg/dL (500 nmol/L) is considered normal.^[3]
3. Electrolytes: Hyponatremia and hyperkalemia are typical in primary insufficiency due to aldosterone deficiency.
4. Autoantibody testing: 21‑hydroxylase antibodies confirm autoimmune etiology.
5. Imaging: CT or MRI of the adrenal glands (primary) or pituitary (secondary) if structural disease is suspected.

Sources: Cleveland Clinic, Johns Hopkins Medicine

Treatment Options

Therapy aims to replace the deficient hormones and manage stressors that can precipitate an adrenal crisis.

Medical Treatment

• Glucocorticoid replacement – Hydrocortisone is the preferred agent (15‑30 mg/day divided 2–3 doses). Alternatives: prednisone or dexamethasone for patients who cannot tolerate hydrocortisone.
• Mineralocorticoid replacement – Fludrocortisone (0.05‑0.2 mg daily) for primary insufficiency to maintain sodium balance and blood pressure.
• Stress‑dose steroids – Double or triple the usual glucocorticoid dose during illness, surgery, or major emotional stress.
• Management of underlying cause – Antituberculous therapy for TB, immunosuppression for autoimmune adrenalitis, or surgical removal of adrenal tumors when indicated.

Home & Lifestyle Measures

• Carry a medical alert bracelet or card indicating “Adrenal Insufficiency – requires steroids.”
• Keep an emergency injection kit (100 mg hydrocortisone sodium succinate) and know how to use it.
• Maintain a regular salt intake (especially if on fludrocortisone) and stay well‑hydrated.
• Monitor blood pressure and electrolytes periodically.
• Educate family, friends, and coworkers about the condition and emergency procedures.

Prevention

Because most cases are autoimmune or result from irreversible damage, primary prevention is limited. However, risk can be reduced by:

• Prompt treatment of infections that can involve the adrenals (e.g., tuberculosis, fungal infections).
• Avoiding abrupt discontinuation of long‑term glucocorticoid therapy; taper under physician supervision.
• Screening individuals with other autoimmune diseases for adrenal antibodies when clinically indicated.
• Vaccinations (e.g., influenza, pneumococcal) to reduce severe infections that could trigger an adrenal crisis.

Living With Adrenal Insufficiency (Addison’s Disease)

Effective self‑management allows most people to lead normal, active lives.

• Medication adherence: Take glucocorticoid and mineralocorticoid doses exactly as prescribed.
• Stress‑dosing protocol:
  • Mild illness (fever, flu‑like symptoms): double the usual hydrocortisone dose until recovery.
  • Severe illness, injury, or surgery: triple the dose and seek medical care promptly.
• Regular follow‑up: Every 3‑6 months for labs (electrolytes, cortisol, ACTH) and dose adjustments.
• Nutrition: Balanced diet with adequate salt (unless advised otherwise), protein, and complex carbs to prevent hypoglycemia.
• Exercise: Safe with proper medication; avoid extreme endurance activities without extra steroid coverage.
• Travel tips: Bring extra medication, keep it in original labeled containers, and have a copy of your prescription for customs.
• Psychosocial support: Join patient support groups (e.g., Addison’s Disease Self‑Help Group) to share experiences and coping strategies.

When to Seek Emergency Care

An adrenal crisis is a life‑threatening emergency. Call 911 or go to the nearest emergency department if you experience any of the following:

• Severe vomiting or diarrhea lasting > 12 hours
• Sudden, intense abdominal or back pain
• Marked weakness, confusion, or loss of consciousness
• Low blood pressure (systolic < 90 mm Hg) or fainting
• High fever (> 38.5 °C / 101.3 °F) with inability to keep oral meds down
• Rapid heart rate (tachycardia) with dizziness

In an emergency, administer the emergency hydrocortisone injection (100 mg IM) if you have one, and inform medical staff of your diagnosis.

References

1. Mayo Clinic. Addison’s disease – Symptoms and causes. https://www.mayoclinic.org
2. Centers for Disease Control and Prevention. Addison’s disease. https://www.cdc.gov
3. National Institutes of Health (NIH). Endocrine Tests – ACTH Stimulation Test. https://www.nhlbi.nih.gov
4. Cleveland Clinic. Addison’s disease – Diagnosis and treatment. https://my.clevelandclinic.org
5. Johns Hopkins Medicine. Addison’s disease. https://www.hopkinsmedicine.org

Medical Disclaimer: This guide is for informational purposes only and does not substitute professional medical advice, diagnosis, or treatment. Always consult a qualified health care provider regarding any medical condition or before making changes to your treatment plan.