Yes with a strict and and meticulous procedure.
If a human being is suffering then it's inhumane to allow them to carry on just because our life is seen so precious. We give livestock/pets better treatment if they're suffering then our own species, how humane is that?
I find it backwards and astounding that we try everything in our power to help deformed babies survive, even though if nature took her course they'd die and on the other hand, we prolong a person's suffering.
Think of all the people they kill for crimes they've committed, healthy human beings. Yet they allow decent, ill ones to suffer...
...I could go on.