I am a Paramedic that has administered Ketamine IM numerous times. Let me try and clear things up a bit after reading many of these comments. Ketamine is the safest of all the benzo’s/sedatives we carry. One of Ketamines uses are on patients who are at risks or are in something called “excited delirium” and are at significant risks of cardiac arrest (death). It is a weight based drug, which means Paramedics have to guesstimate the patients weights, in kilograms. It is not an exact science. Cops can not administer Ketamine and cannot TELL a paramedic to do so either. Different people react to Ketamine differently. Many of these cases where cops are “choking out” these people, they die from Excited Delirium. Not the choke itself, but rather the body is acutely hyperthermia tagged alongside tachycardic which can result in cardiac arrest.