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  Severe comorbidity:  Heart failure (New York Heart Association class IV) Kidney failure with an estimated glomerular filtration rate <30 mL/min (chronic kidney disease stage 4-5) Liver disease in the form of 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 -