Apparently Dexamethasone works as well. However the sides seem to outweigh the benefit:
If dexamethasone is given orally or by injection (parenteral) over a period of more than a few days, side-effects common to systemic glucocorticoids may occur. These may include:
Stomach upset, increased sensitivity to stomach acid to the point of ulceration of esophagus, stomach, and duodenum
Increased appetite leading to significant weight gain
A latent diabetes mellitus often becomes manifest. Glucose intolerance is worsened in patients with preexisting diabetes.
Immunsuppressant action, particularly if given together with other immunosuppressants such as ciclosporine. Bacterial, viral, and fungal disease may progress more easily and can become life-threatening. Fever as a warning symptom is often suppressed.
Psychiatric disturbances, including personality changes, irritability, euphoria, mania
Osteoporosis under long term treatment, pathologic fractures (e.g., hip)
Muscle atrophy, negative protein balance (catabolism)
Elevated liver enzymes, fatty liver degeneration (usually reversible)
Cushingoid (syndrome resembling hyperactive adrenal cortex with increase in adiposity, hypertension, bone demineralization, etc.)
Depression of the adrenal gland is usually seen, if more than 1.5 mg daily are given for more than three weeks to a month.
Hypertension, fluid and sodium retention, edema, worsening of heart insufficiency (due to mineral corticoid activity)
Dependence with withdrawal syndrome is frequently seen.
Increased intraocular pressure, certain types of glaucoma, cataract (serious clouding of eye lenses)
Dermatologic: Acne, allergic dermatitis, dry scaly skin, ecchymoses and petechiae, erythema, impaired wound-healing, increased sweating, rash, striae, suppression of reactions to skin tests, thin fragile skin, thinning scalp hair, urticaria.
Allergic reactions (though infrequently): Anaphylactoid reaction, anaphylaxis, angioedema. (Highly unlikely, since dexamethasone is given to prevent anaphylactoid reactions.)
Other side-effects have been noted, and should cause concern if they are more than mild.
The short time treatment for allergic reaction, shock, and diagnostic purposes usually does not cause serious side effects.