Some articles to consider:
Actually, I am heavily involved in the assisted suicide issue, which takes abuse to a whole new level. My blogs/website include Choice is an Illusion, which is undergoing a face lift, and Montanans Against Assisted Suicide.
Here’s a short article regarding some of the problems: http://www.choiceillusion.org/2014/01/washingtons-assisted-suicide-act.html This is a court case that I’m involved in: http://www.montanansagainstassistedsuicide.org/2013/12/judge-hears-assisted-suicide-arguments.html
and while I am not a proponent of suicide, I do believe that a senior can self administer any and all pain meds they need, and if they want to refuse artificial life sustaining machines, that is fine also. That’s JMHO.