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Continuous subcutaneous hydrocortisone infusion in Addison’s disease

¹ Division of Endocrinology, Institute of Medicine, University of Bergen, and ² Department of Medicine, Haukeland University Hospital, 5021 Bergen, Norway

(Correspondence should be addressed to K Løvås; Email: kristian.lovas{at}med.uib.no)

Objective: The conventional replacement therapy in Addison’s disease (AD) does not restore the normal diurnal cortisol rhythm. We explored the feasibility and safety of continuous s.c. hydrocortisone infusion (CSHI) as a novel mode of glucocorticoid replacement therapy.

Design and methods: Seven patients with AD were treated with CSHI in an open-labelled clinical study for up to three months. Adequacy of glucocorticoid replacement was assessed by 24 h blood and saliva sampling in one patient and by salivary cortisol day curves in six outpatients. Subjective health status was monitored by the Short Form-36 questionnaire.

Results: CSHI re-established the circadian variation and normal levels of cortisol in the patients, with minor day-to-day variation. Most of the patients could reduce their glucocorticoid dose considerably without adverse reactions. The treatment was well tolerated and positively evaluated by the patients.

Conclusions: CSHI is technically feasible and safe in patients with AD. A daily dose of ~10 mg/m² body surface area/day restores the circadian variation and normal levels of salivary cortisol in most patients, which is close to the estimated daily requirement. We hypothesise that selected patients will benefit from restoration of the circadian cortisol rhythm.