Dexamethasone provided 4 mg at every 6 hours ... and prednisone also allows for more flexible dosage adjustments (Spruill & Wade, 1988). After 4 weeks, another cortisol level should be drawn.

The usual but empirical initial dose in brain tumor patients is an intravenous bolus of 10 mg of dexamethasone, followed by a maintenance dose of 4 mg given by the intravenous (IV) route every 6 ...