Sedation is a necessary component of care for critically ill and injured individuals. Sedatives assist in coping with mechanical ventilation and other invasive devices, and help patients tolerate procedures and noxious stimuli in the intensive care unit. Sedatives are also useful in the control of agitation and delirium. In addition to fundamental humane reasons, calming patients with sedatives provides physiologic benefits, such as reducing oxygen consumption expended during restlessness, and prevents dislodgement of life-preserving tubes and catheters. When administering sedatives to...