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Prednisolone: Uses, Dosage and Side Effects

Prednisolone is a synthetic corticosteroid with potent anti-inflammatory and immunosuppressive properties. It is widely used to treat inflammatory, allergic, and autoimmune conditions.

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Things worth knowing about "Prednisolone"

Prednisolone is a synthetic corticosteroid with potent anti-inflammatory and immunosuppressive properties. It is widely used to treat inflammatory, allergic, and autoimmune conditions.

What is Prednisolone?

Prednisolone is a synthetic glucocorticoid (corticosteroid) closely related to the naturally occurring hormone cortisol, which is produced by the adrenal glands. It is the biologically active form of prednisone, meaning the body can use it directly without metabolic conversion. Prednisolone is one of the most widely prescribed anti-inflammatory and immunosuppressive medications in modern medicine.

Mechanism of Action

Prednisolone works by binding to glucocorticoid receptors inside cells, which then alters the expression of specific genes involved in inflammation and immune response. The key effects include:

Anti-inflammatory action: Suppression of inflammatory mediators such as prostaglandins, leukotrienes, and cytokines.
Immunosuppression: Reduced activity of immune cells including T-lymphocytes and macrophages, dampening overactive immune responses.
Antiallergic effect: Inhibition of histamine release and other allergy mediators.
Antiproliferative effect: Relevant in certain cancer therapies due to its ability to inhibit cell growth.

Indications

Prednisolone is used across a broad range of medical conditions:

Allergic conditions (e.g. severe allergic reactions, allergic asthma)
Autoimmune diseases (e.g. rheumatoid arthritis, systemic lupus erythematosus, multiple sclerosis relapses)
Inflammatory bowel disease (e.g. Crohn's disease, ulcerative colitis)
Skin disorders (e.g. severe eczema, psoriasis)
Respiratory conditions (e.g. COPD exacerbations, severe asthma)
Organ transplantation (rejection prophylaxis)
Certain cancers (as part of chemotherapy regimens, e.g. lymphomas)
Adrenocortical insufficiency (replacement therapy)

Dosage and Administration

Dosing of prednisolone depends on the condition being treated, its severity, and the individual patient response. Typical dosage ranges include:

Low dose: up to 7.5 mg/day (e.g. long-term management of rheumatic conditions)
Medium dose: 7.5–30 mg/day (e.g. moderate inflammatory conditions)
High dose / pulse therapy: up to 1–2 mg/kg body weight per day or higher (e.g. acute flares)

Prednisolone is available as tablets, oral solution, injectable preparations, and topical formulations (cream, eye drops). Oral doses should ideally be taken in the morning with food to align with the body's natural cortisol rhythm and to reduce stomach irritation. After prolonged use, the dose must be gradually reduced (tapered) rather than stopped abruptly, as sudden discontinuation can cause adrenal insufficiency.

Side Effects

Short-term use at low doses is generally well tolerated. However, prolonged or high-dose treatment is associated with a range of side effects:

Common Side Effects

Weight gain and fat redistribution (Cushing's syndrome features: moon face, central obesity)
Elevated blood sugar (steroid-induced diabetes)
High blood pressure (hypertension)
Osteoporosis (bone density loss) with long-term use
Sleep disturbances, mood swings, irritability
Increased susceptibility to infections due to immune suppression
Skin thinning and easy bruising

Serious Side Effects

Adrenal insufficiency if treatment is stopped abruptly
Peptic ulcers, especially when combined with NSAIDs
Cataracts and glaucoma with long-term use
Steroid myopathy (muscle weakness)
Psychiatric reactions including euphoria, depression, or psychosis

Contraindications and Interactions

Prednisolone should be used with caution or avoided in patients with:

Active severe infections (e.g. untreated tuberculosis, systemic fungal infections)
Peptic ulcer disease
Severe osteoporosis
Uncontrolled diabetes mellitus

Notable drug interactions include:

NSAIDs (non-steroidal anti-inflammatory drugs): increased risk of gastrointestinal bleeding
Anticoagulants (e.g. warfarin): altered clotting effects
Antidiabetic medications: reduced blood glucose-lowering efficacy
Live vaccines: increased infection risk due to suppressed immune system

Prednisolone in Pregnancy and Breastfeeding

Prednisolone may be used during pregnancy when the benefits outweigh the potential risks, but this requires careful medical evaluation. During breastfeeding, standard therapeutic doses are considered largely safe, as only small amounts pass into breast milk.

References

British National Formulary (BNF) – Prednisolone monograph. BMJ Group and Pharmaceutical Press, 2023.
Rang, H. P., Dale, M. M., Ritter, J. M., Flower, R. J.: Rang and Dale's Pharmacology. 9th edition. Elsevier, 2019.
Buttgereit, F., Burmester, G. R., Lipworth, B. J.: Optimised glucocorticoid therapy: the sharpening of an old spear. Lancet. 2005;365(9461):801-803. DOI: 10.1016/S0140-6736(05)17989-6.

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