I am in favor of assistant suicide for the case of terminally illness. Such practice is described at least once in the bible- King Saul asked his servant to slay him after he had fallen on his sword and yet remained alive.
How do you know what a terminal illness is? Many things which would have been a death sentence 40 years ago have medications and treatments which will extend life another 15-25 years... I don't agree with this... What if tomorrow there is a cure for the disease?
What about brain death? What do you think should happen if a person has sustained a brain insult /injury resulting in brain death.
It is a hard call... My position is based on faith that life has a purpose and death will come when our time has arrived. To hasten death for purposes of avoiding pain and saving money is not acceptable, from my position. In the case where a person is effectively dead there may be no problem with letting go.
As the article I posted above points out some insurance companies may recommend to people to commit suicide rather than pay for treatments which are costly. In this case Euthanasia is a very, very bad thing.