Our data suggest that tissue exposure to glucocorticoid is supra-physiological in hypopituitary patients with untreated GH deficiency taking hydrocortisone replacement therapy. This situation is ameliorated by GH replacement therapy. However, local and circulating cortisol concentrations are more vulnerable to the inhibitory effect of GH on 11 beta HSD1 in patients taking cortisone acetate, such that serum cortisol assessments should be made in patients taking cortisone acetate after GH therapy to ensure that glucocorticoid replacement remains adequate.

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