Systemic lupus erythematosus (SLE) is a long-term condition caused by the body’s own immune system mistakenly attacking healthy tissue. Various lifestyle changes are recommended if you are diagnosed with SLE. If patients cannot manage their symptoms with these changes alone, medications are needed. The PHOENYCS GO Study is a clinical research study looking into the safety and effectiveness of adding an investigational drug to standard therapies for people with moderately- to severely-active SLE.