What are the advantages of euthanasia except for ending the pain of the patient?

euthanasia is not the way you should adopt to kill the pain of a patient. Who can say that death is the only way to resolve pain? Infact a brain death(Cerebral palsy) patient whose heart is going on and patient is taking breath, i think you should give life support on humaniterian ground. I believe euthanasia resolves pain of the family members of the patient but not the patient's himself. Some materialist say about reducing financial burden. I would say be human and pray that his natural Death "Be Peaceful"