Patient is admitted to one of the study hospitals' Emergency Department greater than six hours after injury;

Patient has received greater than 4 liters fluid since time of injury;

Patient is enrolled in another shock trial;

Patient is asystolic or requires CPR (cardiopulmonary resucitation) prior to randomization;

Female patient is pregnant by report or suspicion;

Patient has known "Do Not Resuscitate" orders or visible/identifiable method of objection to participation (e.g., exclusion bracelet);

Low Dose Vasopressin in Traumatic Shock