but dexamethasone 6 mg (as the sodium phosphate salt) i.m. every 12 hours for four doses (single course) has also been used. The biological activity of the two agents is nearly identical ...
Dexamethasone provided 4 mg at every 6 hours, the usual initial dose—equivalent to 400 mg of cortisol per day—is about 20 times the normal rate of endogenous production. In patients who have ...
For the LDDST, a diagnosis of Cushing's syndrome is excluded if patients' serum cortisol levels are suppressed to ≤50 nmol/l, after the administration of 0.5 mg dexamethasone at 6 h intervals ...