Ixekizumab is a medication used to treat autoimmune conditions, primarily psoriasis and ankylosing spondylitis. It works by targeting a specific protein in the immune system called interleukin-17A, which plays a key role in inflammation and the development of these diseases. Administered through injections, ixekizumab helps reduce the symptoms of these conditions, such as skin lesions and joint pain. It is typically prescribed for patients who have not responded well to other treatments, providing an alternative option for managing their symptoms effectively.