Dexamethasone is a member of the glucocorticoid class of hormones. This means they are steroids but, unlike the anabolic steroids that we hear about regarding sports medicine, these are "catabolic" steroids. Instead of building the body up, they are designed to break down stored resources (fats, sugars and proteins) so that they may be used as fuels in times of stress. Cortisone would be an example of a related hormone with which most people are familiar. Glucocorticoids hormones are produced naturally by the adrenal glands.

We do not use glucocorticoids for their influences on glucose and protein metabolism; we use them because they are also the most broadly anti-inflammatory medications that we have.