The hypothalamic-pituitary-adrenal axis is suppressed by high-dose corticosteroids. What is the primary reason for tapering off rather than stopping abruptly?

The hypothalamic-pituitary-adrenal axis is suppressed by high-dose corticosteroids. What is the primary reason for tapering off rather than stopping abruptly?

• A. To prevent rebound hyperglycemia
• B. To maintain immune function
• C. To allow pituitary ACTH production and adrenal cortisol synthesis to resume
• D. To reduce the risk of infection

Answer: (C)

Long-term, high-dose corticosteroids suppress the hypothalamic-pituitary-adrenal axis through negative feedback. The hypothalamus reduces CRH, the pituitary reduces ACTH, and the adrenal cortex atrophies, leading to diminished endogenous cortisol production. Stopping abruptly leaves the body without sufficient cortisol to handle stress and maintain vascular tone, often causing symptoms like fatigue, low blood pressure, nausea, and hypoglycemia. Tapering gradually allows the pituitary to restart ACTH production and the adrenals to regain normal cortisol synthesis, preventing adrenal crisis. Recovery of adrenal function can take days to weeks, so a gradual reduction is essential, even though other issues like hyperglycemia or infection risk may also be concerns during therapy.

Long-term, high-dose corticosteroids suppress the hypothalamic-pituitary-adrenal axis through negative feedback. The hypothalamus reduces CRH, the pituitary reduces ACTH, and the adrenal cortex atrophies, leading to diminished endogenous cortisol production. Stopping abruptly leaves the body without sufficient cortisol to handle stress and maintain vascular tone, often causing symptoms like fatigue, low blood pressure, nausea, and hypoglycemia. Tapering gradually allows the pituitary to restart ACTH production and the adrenals to regain normal cortisol synthesis, preventing adrenal crisis. Recovery of adrenal function can take days to weeks, so a gradual reduction is essential, even though other issues like hyperglycemia or infection risk may also be concerns during therapy.