Dexamethasone belongs to a group of medicines called corticosteroids. It has anti-inflammatory effects and can regulate the body’s metabolism and immune response. Dexamethasone oral tablet is a prescription drug used to treat many conditions, including allergic reaction. Learn about its side effects, dosage, and more. Dexamethasone is a corticosteroid (cortisone-like medicine or steroid). It works on the immune system to help relieve swelling, redness, itching, and allergic reactions. Dexamethasone tablets are also used in combination with other medicines to treat multiple myeloma (a type of bone marrow cancer). Dexamethasone tablets are a corticosteroid medication that treats inflammation of the skin, joints, lungs and other organs. It may be prescribed for conditions like asthma, allergies and arthritis. Dexamethasone (Dexamethasone) may treat, side effects, dosage, drug interactions, warnings, patient labeling, reviews, and related medications including drug comparison and health resources. NHS medicines information on dexamethasone tablets and liquid – what they're used for, side effects, dosage and who can take them. Learn about dexamethasone usage and dosing. Read the latest news and reviews about the drug as well as potential side effects and popular alternatives. Dexamethasone is a corticosteroid that prevents the release of substances in the body that cause inflammation. Dexamethasone is used to treat many different inflammatory conditions such as allergic disorders and skin conditions. It relieves inflammation (swelling, heat, redness, and pain) and is used to treat certain forms of arthritis; skin, blood, kidney, eye, thyroid, and intestinal disorders (e.g., colitis); severe allergies; and asthma. Dexamethasone is also used to treat certain types of cancer. Dexamethasone intravitreal steroid implants have been approved by the US Food and Drug Administration (FDA) to treat ocular conditions such as diabetic macular edema, central retinal vein occlusion, and uveitis.