Developed by psychiatrists who are in active clinical practice, this guideline offers useful information to psychiatrists who care for patients with delirium. It summarizes the current data available on this topic and provides recommendations for treatment. In helping the clinician provide treatments that address the underlying aetiology of the delirium, it discusses psychiatric management, environmental and supportive interventions, and specific pharmacologic treatments. The text examines clinical features influencing treatment, including comorbid psychiatric disorders and general medical conditions. It also provides guidance for educating the patient and family, and assessing and ensuring patient safety. Ultimately, this guideline can assist psychiatrists in their clinical decision-making and improve the care of their patients.