Hydrocortisone and Placebo in Patients With Symptoms of Adrenal Insufficiency After Cessation of Glucocorticoid Treatment

Inclusion Criteria: * Age ≥ 50 years * A diagnosis of PMR or GCA in GC free remission for \>2 week and \<12 weeks after treatment with prednisolone (any dosage) for ≥12 weeks Exclusion Criteria: * Known primary or secondary adrenal insufficiency * Known Cushing´s syndrome * Heart failure (New York Heart Association class IV) * Kidney failure with an estimated glomerular filtration rate \<30 mL/min * Liver cirrhosis * Active cancer * Known severe immune deficiency * A history of psychiatric disease requiring treatment by a psychiatric department (for affective disorders only if within the last year before study entry) * Alcohol consumption \>21 units per week * Planned major surgery during the study period at study entry * Use of drugs that interfere with cortisol metabolism/measurements: * Systemic oestrogen treatment within 1 month before study inclusion * Strong CYP3A4 inhibitors or inducers * Use of other glucocorticoid formulations: inhaled, intra-articular or intramuscular injections, creams European steroid group IV applied in genital area * Permitted glucocorticoid formulations: eye-drops, nasal spray, creams European group I-III, and European group IV applied in non-genital area * Inability to provide written informed consent