Immunomodulators are substances that help regulate or modify the immune system's response. They can either enhance or suppress immune activity, making them useful in treating various conditions, such as autoimmune diseases and certain cancers. By adjusting the immune response, these medications can help the body fight infections or reduce inflammation. Common types of immunomodulators include corticosteroids, biologics, and disease-modifying antirheumatic drugs (DMARDs). Each type works differently, targeting specific pathways in the immune system. While they can be effective, immunomodulators may also have side effects, so careful monitoring by healthcare professionals is essential.