"Euthanasia is a grave violation of the law of God, since it is the deliberate and morally inacceptable killing of a human person". (Pope John Paul II)
Anyone who helps someone to die would be damaging their own and the other person's karma.
Voluntary Euthanasia is wrong, as it shows that the person's mind is in a bad state.
Only Allah can choose when a life will end.
Saving someone from pain is not a reason to kill them.