As for irrationality, it is extremely patronising to suggest that individuals making their own decision should not be allowed to.
I'm all for Euthanasia in the palliative care setting, however Coblin, I assure you, I am the first to admit that decisions and requests I made while unbelievably sick were completely irrational. Being unwell really does cloud your judgement (oh, plus Valium lol). For example:
1. I asked a nurse to kill me so my boyfriend didn't have to see me so sick.
2. When my boyfriend came in, I asked him to cut my legs off because they were hurting too much and were "useless now."
3. Asked to be discharged from hospital to go home and die
4. Asked to be discharged from hospital so I could go to school and catch up on work
5. Asked to be discharged from hospital so I could go to my friend's party
6. Told the doctor to remove the nasogastric tube because it hurt my nose
7. Then told the doctor to shove his stethoscope up his arse.
8. Asked my surgery to be performed with no anesthetic because I was sick of being asleep.
9. Told my boyfriend that I was breaking up with him.
Anyway. I am glad that none of the above occurred, and they didn't take my request of "please kill me" seriously!! Everything was in the moment, and the illness I had was effecting my thought process. That's just my experience though, lol.
So, there should be safe guards in place to ensure no one is accused of murder, and that it is what the patient truly wants. And it should only be available in palliative care IMO.