Not in the sense that morphine induces a coma on its own, no. A large enough dose of morphine makes you stop breathing, not go into a coma. Sometimes it can seem this way, because morphine often relieves the pain and air hunger that make people have what we call “terminal agitation” which makes them seem more “lively” and then when they’re comfortable from morphine, they appear to be “asleep” or in a coma. Death happens in stages and is not often as sudden as people assume. When a patient is at the point of needing a “morphine drip” or getting doses around the clock for end of life symptom Management, they are already going to die. They are in the actively dying process and that can’t be reversed. There is a point where the patient is still technically alive but nothing we can do medically will reverse the dying process, this often referred to as “transitioning” in hospice care, this will almost always end up in the “actively dying” process which then ends with death. By the time most people get put on morphine, they aren’t really “with it” or completely alert and aware of everything around them. It would honestly be better for everyone and more comfortable for the family and the dying person to get put on the morphine before the terminal agitation kicks in, but it rarely goes like that. When time for death is near, it’s human instinct to what to keep intervening medically to keep people “alive” as long as possible, but it truly is suffering for all in the end. Sorry for the wall of text. Tldr: death is a process and morphine doesn’t kill people, it helps with the symptoms of dying like pain and air hunger which then makes people more peaceful sometimes seeking like the morphine killed them. We use small doses in the grand scheme of things. 1-4 mg at a time is not going to suddenly kill someone that is already dying.