I greatly offended my mother's psychiatrist once with a similar thought. He was using my mother's suicidality as proof that she needed inpatient treatment.

I told him - "She suffers from migraines, and for 3 out of 4 weeks in an average month she must spend the entire day immobile in a dark room. There are no treatments in the near term which are expected to improve her outlook. The pain is debilitating. Doctor, who is "insane" - the person who wants a way out of the constant agony, or the person who says "More, please!""

I believe that the right to life as enshrined in the Constitution (and endowed by my Creator) must, inherently, also include the right to end that life, if a man (or woman) so chooses.