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Corticosteroids: Types & Function

Nursing Knowledge

Corticosteroids: Types & Function

Corticosteroids are a class of steroid hormones that are produced in the adrenal cortex. They play a crucial role in regulating various physiological processes, including blood electrolyte levels, carbohydrate and protein metabolism, and immune response. As such, they are widely used in clinical practice to treat a range of conditions, from inflammatory disorders to autoimmune diseases. Understanding the types and effects of corticosteroids is essential for nurses and other healthcare professionals who work with clients receiving corticosteroid treatment.
Last updated: September 21, 2026

Table of contents

What are corticosteroids?

Corticosteroids are a class of steroids that are produced in the adrenal cortex. As a medication, corticosteroids mimic the hormone function and are used to treat a variety of conditions such as asthma, arthritis, allergies, lupus, multiple sclerosis, and certain skin conditions.

What are the types of corticosteroids?

The two types of corticosteroids are mineralocorticoids (e.g., aldosterone, fludrocortisone) and glucocorticoids (e.g., cortisol, prednisone). 

Mineralocorticoids 

Mineralocorticoids regulate sodium, potassium, and water balance (affecting blood pressure). They are used to treat conditions such as Addison disease, where there is a deficiency of these hormones.

Glucocorticoids

Glucocorticoids are primarily used to manage conditions, such as asthma, arthritis, and autoimmune diseases. Their properties are:

  • Anti-inflammatory and immunosuppressive effects
  • Control carbohydrate, fat, protein metabolism
  • Inhibit phospholipase A₂, reducing production of inflammatory mediators
  • Suppress eosinophil activity 
  • Most synthetic glucocorticoids also have some mineralocorticoid activity, which varies by agent. 

Effects of mineralocorticoids

Mineralocorticoids, such as fludrocortisone, primarily affect the body’s balance of sodium and water, leading to increased blood volume and blood pressure. They are often used to treat conditions like Addison disease for adrenal insufficiency.

However, they can also have side effects such as fluid retention, high blood pressure, heart failure, hypokalemia (low potassium levels), and in rare cases, abrupt discontinuation may contribute to adrenal insufficiency in some cases (particularly when combined with glucocorticoids). Therefore, they should be used carefully, monitored regularly, and never abruptly discontinued. Patients on fludrocortisone should be especially monitored for hypokalemia as this is a more common and potentially dangerous adverse effect when using this agent.

Aldosterone → Sodium/water retention, potassium excretion → Increased blood volume → Higher blood pressure 

Effects of glucocorticoids 

Glucocorticoids, such as prednisone, have anti-inflammatory and immunosuppressive effects. They are used for conditions such as asthma, allergies, autoimmune diseases, and inflammatory conditions.

However, their side effects can include increased blood glucose levels, weight gain, mood changes, insomnia, osteoporosis with long-term use, adrenal suppression with long-term use, risk of peptic ulcer risk, especially when combined with NSAIDs, and increased susceptibility to infections due to suppressed immune response. Like mineralocorticoids, discontinuing glucocorticoids abruptly can lead to adrenal crisis, so should be tapered off under the direction of a healthcare provider. Patients on corticosteroids may not mount typical signs of infection (e.g., fever, elevated WBC) because the inflammatory response is blunted 

Cortisol → 

  • Affects carbohydrate, fat, protein metabolism
  • Anti-inflammatory
  • Lowered eosinophil action
  • Affects glucose metabolism
  • Affects mood, behavior
  • Higher bone reabsorption

What is the corticosteroid pathway? 

The corticosteroid pathway, or the hypothalamic-pituitary-adrenal (HPA) axis, is the body’s major stress response system. Here’s how it works:

  1. Hypothalamus releases corticotropin-releasing hormone (CRH).
  2. Pituitary gland secretes adrenocorticotropic hormone (ACTH).
  3. ACTH stimulates the adrenal glands to produce and release corticosteroids (cortisol/aldosterone).

What is the therapeutic goal of corticosteroid treatment?

The therapeutic goal of corticosteroid treatment is to have an anti-inflammatory effect and decrease immune reaction. They also can be used to replace hormones in adrenal insufficiency. 

What is the role of corticosteroids in the body?

  • Stress response
  • Immune response
  • Inflammation regulation
  • Carbohydrate metabolism
  • Protein metabolism
  • Blood electrolyte levels
  • Mood and behavior

These functions are essential for maintaining homeostasis in the body. When corticosteroid levels are too high or too low, it can lead to health problems.

How do corticosteroids interact with other medications?

Corticosteroids can interact with many other medications, altering their effects. For example, they can increase the blood glucose in clients with diabetes or increase the risk of peptic ulcer disease or gastrointestinal bleeding with NSAIDs. Always check for potential interactions in your client’s medication plans:

  • Concurrent use with loop or thiazide diuretics increases the risk of hypokalemia. 
  • Corticosteroids can enhance or reduce anticoagulant effects; INR monitoring is essential when patients are concurrently taking anticoagulants like warfarin.
  • Immunosuppressed patients on corticosteroids should not receive live vaccines (e.g., MMR, varicella, live influenza). 
  • Corticosteroids can significantly increase blood glucose, potentially requiring dose adjustments of insulin or oral hypoglycemics.

What are signs of corticosteroid prolonged use?

Signs can include hyperglycemia, hypertension, fluid retention, insomnia, and mood changes. In severe cases, corticosteroid overdose can cause signs of corticosteroid excess/iatrogenic Cushing syndrome .

Client education regarding long-term corticosteroids 

Instruct clients to: 

  • Take medication as prescribed
  • Carry medical alert identification 
  • Avoid contact with individuals who have active infections 
  • Report adverse effects
  • Not stop taking the medication abruptly 
  • Take oral corticosteroids with food to reduce GI irritation 
  • Edited: Monitor signs of side effects (e.g., weight gain, mood changes, increased thirst or hunger)
  • Edited: Report signs of infection, even if they seem mild  
  • Stick to regular follow-up schedules with providers
  • Discuss calcium/vitamin D supplementation and bone density monitoring with  providers
  • Discuss stress-dosing schedules where additional doses may be added to routine doses  

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