Voluntary euthanasia or physician-assisted suicide for an adult who is in a rational state of mind, whose terminal suffering happens to be unbearable despite the best medical efforts, is an idea whose time has come. I'll explain why. We die differently today from our forebears. In this century, medicine has made tremendous strides towards keeping us healthy and living longer, for which we are all grateful. But modern medicine has not entirely solved the problem of terminal pain, and it certainly never will be able to answer the very personal question of an individual person's quality of life.
Some people can stand more pain than others.
Some patients in their dying days suffer distressing symptoms, like loss of bowel control, haemorraging, bedsores, permanent hiccups and so forth. So psychic pain is added to rest of the problems. Take note that I have liberally used the word 'some'. Most people die quickly, peacefully, and painlessly. Of that there is no doubt.