Effect of Glycyrrhizic Acid on 11 β -Hydroxysteroid Dehydrogenase Enzyme in Adrenal Insufficiency Female Rats. Control negative: received normal saline, control positive: hydrocortisone, Therapeutic: received hydrocortisone then Glycyrrhizic acid, Protective: received hydrocortisone with Glycyrrhizic acid, Glycyrrhizic Acid: Glycyrrhizic acid only.