The California legislature has just passed a "right-to-die" law similar to Oregon's. The patient must be competent and able to self-administer the drug prescribed by a physician. (Not sure at this point if California Governor Brown will sign the bill.)
Currently, Oregon, Washington and Vermont have laws that allow physician-assisted suicide and Montana allows it by court decision (New Mexico's Court of Appeals just reversed a lower court's ruling in favor of physician-assisted suicide).
Anyway, ignore any stories entitled "California legalizes euthanasia." Euthanasia is the intentional killing of a person to relieve his or her suffering. It is considered criminal homicide and is illegal throughout the United States.
See how important words can be in the discussion of end-of-life issues?