This chapter provides a summary of the landmark study known as the CORTICUS trial. Among patients suffering from septic shock, does low dose hydrocortisone improve mortality? Starting with that question, it describes the basics of the study, including funding, study location, the population studies, number of patients, study design, study intervention, follow-up, endpoints, results, and criticism and limitations. The chapter briefly reviews other relevant studies and information, discusses implications, and concludes with a relevant clinical case. The CORTICUS trial failed to demonstrate a benefit on mortality with steroid therapy among patients with septic shock. Based on CORTICUS and other studies, the Surviving Sepsis Campaign guidelines no longer recommend steroids for all patients with septic shock. Corticosteroids should be considered, however, for patients with septic shock who do not respond to fluids and vasopressor therapy.