This is a loaded and complicated questing - like it or not esentally physician assisted where cronic pain is involved happens all the time - it's just not put that way.. Example, patent is sick with no chance of recovery and in constant pain enver though already on hihgh doses of Morphine, well more Morphine than they are already taking will kill them for sure, the doctor and patent both know this, patent begs for it anyway, doctor dose it claim the idea was pain relief even though he know full well what was likely to happen by giving them more..
As for personally - well my religion would say it's wrong period, fortunately, I don't use that alone as a moral compass. I really can not agree with laws (and they are actually on the books, even if not used by law enforcement) that actually make suicide illeagal, that is just ridiculous. As far as doctor assisted that I don't know about. But I would say if an attempt was made, but they were bought to the ER first, but it was clear that was there intent, and the doctor there agrees that there is really nothing anyone can do for them anyway, perhaps error on the side of caution and say, it had to have been know for some time to be sure it's not an impulsive act - if the ER is sure of that, I would say they should just leave the guy alone, and if the survive despite them doing nothing - no 72 hour hold or whatever, just walk right out to be free to try it again. HOWEVER that's only after being absolutely sure that was not impulsive, or due to a temporary situation.