Cytokine inhibitors are medications designed to block the action of cytokines, which are proteins that play a crucial role in the immune system. By inhibiting these proteins, these drugs can help reduce inflammation and modulate immune responses, making them useful in treating various autoimmune diseases, such as rheumatoid arthritis and psoriasis. These inhibitors can target specific cytokines, like interleukin-6 or tumor necrosis factor-alpha, to provide more precise treatment options. They are often used when traditional therapies are ineffective, offering patients relief from symptoms and improving their quality of life.