Abstract
Context
Pharmacokinetic properties of cortisone acetate (CA) and hydrocortisone (HC) differ because CA needs to be converted into cortisol to become active.
Objective
This work analyzed the metabolic consequences of switching CA to an equivalent daily dose of HC in patients with secondary adrenal insufficiency (SAI).
Design
This was a post hoc analysis from a prospective study including individuals with hypopituitarism receiving growth hormone replacement. Data were collected before and after a switch from CA to an equivalent dose of HC (switch group). Two control groups were included: patients continuing CA replacement (CA control group) and adrenal-sufficient hypopituitary patients (AS control group).
Results
The analysis included 229 patients: 105, 31, and 93 in the switch, CA control, and AS control groups, respectively. After the change from CA to HC, increases in mean body weight (1.2 kg; P < .05), waist circumference (2.9 cm; P < .001), body fat measured by dual-energy x-ray absorptiometry (1.3 kg; P < .001), and glycated hemoglobin (0.3%; P < .05) were recorded in the switch group. The increase in mean waist circumference was greater than in the AS control group (0.9 cm; P < .05). Mean body fat increased in the switch group but not in the CA control group (–0.7 kg; P < .05).
Conclusions
A switch from CA to an equivalent dose of HC was associated with a worsened metabolic profile, suggesting that HC has a more powerful metabolic action than CA based on the assumption that 20 mg HC equals 25 mg CA.
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