i don't think Euthanasia is right. However, it would be have to be under the most needed circumstances would it be approved. Like say in battle where the person is near death on the field and you feel like they would not be able to live their life in the same way ever again and if they wished to be killed then i suppose.
on the other hand as for it being someone who is really finding hard to live with a horrible illness then i would have to think it through properly because if someone asked me to ease their suffering then i would have to really really think hard about if it is the right thing to do because i could go to jail for commiting murder. To which i don't think i would handle at all.
Its just really hard to judge something like that because it would depend on the situation really and how bad someone's illness really is. I just hope no one will ask me to do such a thing because i would just be filled with guilt for actually do it.