I hesitated to write about this topic since it is very sensitive to my culture. I will try to summarize my opinion respectfully in few lines. First of all, euthanasia is to end someone's life to relieve their endless pain whether it was physical or psychological. Some argue that it should be legalized and others believe that is must be banned. Both parties have their own reasons behind their claims.
As for my opinion, I think my answer depends on the case severity. For example, a patient in coma can wake up anytime regardless on his health condition. In this case, ending his life would be killing any chance of his survival. What if he woke up the next morning and continued his life happily and successfully? On the other hand, a brain-dead patient is living on life support machines. This person is clinically dead since his brain can not function at all and there is no chance of his survival. This makes him an eligible organ donor who can save around 30 persons. Are we extending his death or his life for this case?
Moreover, euthanasia should be conducted professionally by doctors in order to be legalized. Doctors are protecting their patients and they know the best way to end their lives painlessly. A person in the medical care system has the right to share his knowledge and advice the patient;however, the decision is up to the patient. A living person should have the right to decide to end his life after an approval from the court. In order to receive the legal permission of mercy killing, a person should go through medical and psychological analysis to determine the severity of the case. Overall, euthanasia is a controversial topic that should be legalized depending on the situation of the patient.