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Corticosteroid – Effects, Uses and Side Effects

Corticosteroids are natural or synthetic hormones produced by the adrenal cortex, known for their anti-inflammatory and immunosuppressive effects.

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Things worth knowing about "Corticosteroid"

Corticosteroids are natural or synthetic hormones produced by the adrenal cortex, known for their anti-inflammatory and immunosuppressive effects.

What is a Corticosteroid?

Corticosteroids are steroid hormones naturally produced by the adrenal cortex. They play a vital role in regulating inflammation, immune function, metabolism, and the body's fluid and electrolyte balance. Both naturally occurring and synthetically produced corticosteroids are used in medicine to treat a wide range of conditions.

Types of Corticosteroids

There are two main classes of corticosteroids:

Glucocorticoids (e.g., cortisol, prednisolone, dexamethasone): These primarily exert anti-inflammatory and immunosuppressive effects. They are used in conditions such as allergies, autoimmune diseases, asthma, and inflammatory disorders.
Mineralocorticoids (e.g., aldosterone, fludrocortisone): These regulate the body's salt and water balance and are essential for maintaining blood pressure.

Mechanism of Action

Corticosteroids bind to specific intracellular steroid receptors and directly influence gene expression. Glucocorticoids suppress the production of pro-inflammatory mediators such as prostaglandins, interleukins, and tumor necrosis factor-alpha (TNF-alpha). This dampens inflammatory responses and reduces the activity of the immune system.

Medical Indications

Corticosteroids are used to treat a wide variety of conditions, including:

Bronchial asthma and chronic obstructive pulmonary disease (COPD)
Allergic reactions and anaphylactic shock
Autoimmune diseases such as rheumatoid arthritis, lupus erythematosus, and multiple sclerosis
Inflammatory bowel diseases (Crohn's disease, ulcerative colitis)
Skin conditions such as eczema and psoriasis
Transplant medicine to prevent organ rejection
Adrenal cortex insufficiency (Addison's disease)

Administration Forms

Corticosteroids are available in several formulations:

Systemic: Tablets, capsules, or injections for whole-body effects
Inhaled: Sprays for asthma or COPD (e.g., budesonide, fluticasone)
Topical: Ointments, creams, or lotions for skin conditions
Local: Injections directly into joints or inflamed areas

Dosage and Usage Notes

Dosage depends on the condition being treated, its severity, and the age of the patient. Short-term use (a few days) is generally well tolerated. With prolonged use, the dose should be tapered gradually, as the body reduces its own hormone production in the adrenal cortex (adrenal suppression). Abrupt discontinuation can lead to a potentially dangerous adrenal insufficiency.

Side Effects

Prolonged or high-dose use of corticosteroids can cause various side effects, including:

Weight gain and redistribution of body fat (Cushing-like appearance)
Elevated blood sugar (steroid-induced diabetes)
High blood pressure
Osteoporosis (bone loss)
Immunosuppression with increased susceptibility to infections
Gastric ulcers and mucosal irritation
Skin changes (skin thinning, stretch marks)
Psychological effects (mood swings, sleep disturbances)
Cataracts and glaucoma with long-term use

Drug Interactions

Corticosteroids can interact with numerous other medications. Special caution is advised when taken alongside:

Non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen or diclofenac (increased risk of gastrointestinal bleeding)
Anticoagulants such as warfarin (altered bleeding tendency)
Antidiabetic medications (blood sugar increase may require dose adjustments)
Certain antibiotics or antifungals (altered corticosteroid metabolism)

References

Lüllmann H., Mohr K., Hein L. (2016): Pharmakologie und Toxikologie. Georg Thieme Verlag, Stuttgart.
World Health Organization (WHO): Model Formulary 2008 – Hormones, Other Endocrine Medicines and Contraceptives. Available at: https://www.who.int
Buttgereit F. et al. (2015): Standardised nomenclature for glucocorticoid dosages and glucocorticoid treatment regimens. Annals of the Rheumatic Diseases, 61(8), 718-722.

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