It is not as simple as a yes or a no. Each individual case is different. If somebody is suffering constantly with no hope of recovery at his/her request they must end her life. One has the right to: Free will and rght over one's own body so therefore they must be able to end their misery. In other cases one may feel as though death is better because their illment has affected their state of mind. If that is the case is is the doctors burden to keep them alive. Now how do we choose who to keep alive? A doctor should nopt be in that position and it is unfair to force him into it. Therefore IMO it is unfair to the majority of the parties involved and one must do anything possible to prolong human life. Even if their is suffering they can make them as confortable as possible but one can not directally end their life.