Sedation is used in multiple settings in palliative care, such as transient controlled sedation, respite sedation, and sedation for refractory psychological or existential suffering; however, it is a controversial technique that can diminish the capacity of the patient to interact, function, and, in some cases, to live. Cherny provides a comprehensive account of the risks associated with different sedation approaches and also highlights the controversies and ethical considerations for palliative care medicine.