## **Core Concept**
Addison's disease is a rare endocrine disorder characterized by the inadequate production of **cortisol** and **aldosterone** hormones by the adrenal glands. The deficiency of these hormones can lead to various symptoms, including fatigue, weight loss, and changes in skin pigmentation. The primary treatment involves replacing these deficient hormones.

## **Why the Correct Answer is Right**
The drug of choice (DOC) for Addison's disease is **hydrocortisone**, a synthetic glucocorticoid that replaces cortisol. Hydrocortisone is preferred because it has both glucocorticoid and mineralocorticoid activities, although for the latter, **fludrocortisone** (a synthetic mineralocorticoid) may also be given if the patient has significant aldosterone deficiency. The use of hydrocortisone helps to alleviate symptoms by replacing the deficient hormones.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is blank and does not provide a valid choice.
- **Option B:** This option is also blank and does not offer a legitimate treatment option for Addison's disease.
- **Option C:** Similarly, this option is blank and lacks a specific treatment.
- **Option D:** This option is blank as well.

## **Clinical Pearl / High-Yield Fact**
A crucial point to remember is that patients with Addison's disease may require **stress dose steroids**. During infections, surgeries, or other stressful conditions, these patients may need higher doses of hydrocortisone to prevent adrenal crisis, which can be life-threatening.

## **Correct Answer:** . hydrocortisone