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Methylprednisolone is a potent anti-inflammatory steroid. It has greater anti-inflammatory potency than Prednisolone, even less tendency than prednisolone to induce sodium and water retention. The relative potency of Methylprednisolone to Hydrocortisone is at least four to one.
Pharmacology
Pharmacodynamic properties: Methylprednisolone Is a potent anti-inflammatory agent with the capacity to profoundly inhibit the immune system. Glucocorticoids primarily bind to and activate intracellular glucocorticoid receptors that being activated bind to promoter regions of DMA (which may activate or suppress transcription) and activate transcription factors that result in inactivation of genes through deacetylation of histones. Methylprednisolone influences the kidney and fluid & electrolyte balance, lipid,
protein, and carbohydrate metabolism, skeletal muscle, the cardiovascular system, the immune system, the nervous system, and the endocrine system.
Pharmacokinetic properties: The absolute bioavailability of Methylprednisclone is generally high (82% to 89%) following oral administration and rapidly absorbed and the maximum plasma concentration is achieved around 1.5 to 2.3 hours across doses following oral administration in normal healthy adults. Methylprednisolone is widely distributed into the tissues and its volume of distribution is 41-61.5 liter. It crosses the Wood-brain barrier and the placental barrier and is secreted in breast milk. The plasma protein binding of Methylprednisolone in humans is approximately 77%. Methylprednisolone is metabolized in the liver to inactive metabolites. No dosing adjustments are necessary for renal failure. Methylprednisolone is haemodializable.