Immunosuppressive therapy is a medical treatment that reduces the activity of the immune system. This therapy is often used to prevent the body from rejecting transplanted organs, such as those from kidney or liver transplants, and to treat autoimmune diseases like rheumatoid arthritis and lupus, where the immune system mistakenly attacks healthy tissues. The therapy can involve medications that inhibit the production of immune cells or block their action. While effective, immunosuppressive therapy can increase the risk of infections and other complications, as the body's ability to fight off pathogens is diminished. Regular monitoring is essential to manage these risks.