👉 An immunosuppressant is a medication that helps to reduce the immune system's ability to fight off infections and diseases by preventing the body from producing enough white blood cells. These drugs are often used in patients with autoimmune disorders, such as lupus or rheumatoid arthritis, where an overactive immune system can cause inflammation and damage to tissues. The exact mechanism of action for immunosuppressants varies depending on their chemical structure, but they typically work by blocking the growth of white blood