A semisynthetic glucocorticoid with anti-inflammatory effects and toxicity similar to those of cortisol; not useful in the treatment of adrenal insufficiency because it causes little sodium retention. For systemic and topical therapy, its actions are similar to those of prednisone, but more potent. Also available as b. sodium phosphate, b. acetate, and b. valerate.

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be·ta·meth·a·sone -'meth-ə-.zōn, -.sōn n a potent glucocorticoid C22H29FO5 that is isomeric with dexamethasone and has potent anti-inflammatory activity

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a synthetic corticosteroid drug with effects and uses similar to those of prednisolone. The side-effects are those of cortisone. Trade names: Betnelan, Betnesol, Betnovate.

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be·ta·meth·a·sone (ba″tə-methґə-sōn) [USP] a synthetic glucocorticoid, the most active of the antiinflammatory steroids; used topically as an antiinflammatory and administered orally in replacement therapy for adrenal insufficiency and as an antiinflammatory and immunosuppressant in a wide variety of disorders.

Medical dictionary. 2011.

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