Dexamethasone Sodium Phosphate 10 mg/mL Injection Somerset 1 mL x 25/pack (RX)Dexamethasone Sodium Phosphate 10 mg mL Injection Dexamethasone sodium phosphate is a synthetic corticosteroid (glucocorticoid) given by injection (IM or IV). In this form it is a water soluble ester of dexamethasone, provided as a sterile solution (10 mg dexamethasone equivalent per 1 mL) for acute treatment of inflammatory or adrenal insufficiency conditions. Because its water soluble, dexamethasone sodium phosphate acts rapidly (fast onset) but has