Dexamethasone is a type of medication known as a corticosteroid. It helps reduce inflammation and suppress the immune system, making it useful for treating various conditions like allergies, asthma, and certain autoimmune diseases. Doctors may also prescribe it to help manage symptoms in patients with severe illnesses, such as COVID-19, by reducing inflammation in the lungs. This medication can be taken in different forms, including tablets, injections, or topical creams. While it can be very effective, it’s important to use dexamethasone under a doctor's guidance, as it can have side effects and may not be suitable for everyone, especially those with certain health conditions.