In a familiar moral dilemma faced by physicians who care for the dying, some patients who are within days or hours of death may experience suffering in a degree that cannot be relieved by ordinary levels of analgesia. In such cases, it may sometimes be possible to honor a competent patient's request for pain relief only by giving an injection of narcotics in a dosage so large that the patient's death is thereby hastened. Doctors rightly worry that taking an action (...) likely to result in a patient's death may violate the Hippocratic injunction against the direct killing of anyone in their care. (shrink)