A-Hydrocort sterile powder contains hydrocortisone sodium succinate as the active ingredient. Hydrocortisone sodium succinate, is a white, or nearly white, odorless, hygroscopic, amorphous solid. It is very soluble in water and in alcohol, very slightly soluble in acetone and insoluble in chloroform. The chemical name is pregn-4-ene-3,20-dione,21-(3-carboxy-1-oxopropoxy)-11,17-dihydroxy-, monosodium salt, (11)- and its molecular weight is 484.52.The structural formula is represented below: Hydrocortisone sodium succinate is an anti-inflammatory adrenocortical steroid. This highly water-soluble sodium succinate ester of hydrocortisone permits the immediate intravenous administration of high doses of hydrocortisone in a small volume of diluent and is particularly useful where high blood levels of hydrocortisone are required rapidly.A-Hydrocort sterile powder is available for intravenous or intramuscular administration. Vials containing hydrocortisone sodium succinate equivalent to 100 mg hydrocortisone, also 0.8 mg monobasic sodium phosphate anhydrous, 8.73 mg dibasic sodium phosphate anhydrous.When necessary, the pH was adjusted with sodium hydroxide so that the pH of the reconstituted solution is within the USP specified range of 7 to 8.For intravenous or intramuscular injection, vial should be reconstituted with Bacteriostatic Water for Injection or Bacteriostatic Sodium Chloride. For intravenous infusion, vial should be reconstituted with Bacteriostatic Water for Injection.