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  • Title: Effects of cloprednol and other corticosteroids on hypothalamic-pituitary-adrenal axis function.
    Author: Ortega E, Rodriguez C, Strand LJ, Segre E.
    Journal: J Int Med Res; 1976; 4(5):326-37. PubMed ID: 1028634.
    Abstract:
    The effects of cloprednol and other corticosteroids on hypothalamic-pituitary-adrenal (HPA) function were studied in healthy subjects after administration of a single oral dose of corticosteroid at 6 a.m. or 6 p.m., and after daily 6 a.m. administration of corticosteroids at various doses for seven days. The degree of HPA suppression was assessed by metyrapone tests (METP), insulin hypoglycaemia tests (IHT) and 6 a.m. fasting plasma cortisol concentrations. Regardless of the corticosteroid tested, 6 p.m. dosing was at least four-fold more suppressive of METP response than 6 a.m. administration. At therapeutically equivalent doses, single doses of triamcinolone and dexamethasone were more suppressive of HPA-axis function than cloprednol, hydrocortisone or prednisolone, After 6 a.m. administration for seven days, 12-5 mg of cloprednol did not impair the cortisol response to IHT or interfere with the METP response. The clinically equivalent dose of prednisolone (25 mg) resulted in slightly greater HPA-axis suppression. All doses of dexamethasone (0-5, 3-75 and 6-0 mg) and of betamethasome (2-0, 4-0 and 6-5 mg) were more suppressive of HPA-axis function than either cloprednol or prednisolone. These results suggest that at equipotent anti-inflammatory doses, cloprednol is slightly less suppressive of HPA-axis function than prednisolone, and both cloprednol and prednisolone are much less suppressive than dexamethasone or betamethasone.
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