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No universally accepted glucocorticoid replacement dose exists for patients with adrenal insufficiency. When hydrocortisone is used, divided doses often are given to mimic natural diurnal variation (higher dose early, lower dose later). In this double-blind crossover study, researchers compared the blood pressure effects of higher and lower hydrocortisone doses in 46 Dutch patients with secondary adrenal insufficiency. Each patient received courses of high-dose and low-dose hydrocortisone (10 weeks each, in random order), according to a dosing protocol. For example, a 70-kg patient received 15 mg daily during the low-dose phase (7.5 mg, 5.0 mg, and 2.5 mg before breakfast, lunch, and dinner, respectively), and twice these amounts during the…