Honestly, I don't know.
Not everyone would want to take advantage of something like that anyway.
People mostly cling to life even when there is no hope.
But isn't the point that the option should be available to those that would want it?
Plucking a figure from the air, 99% of people might either die suddenly without intervention or want to cling onto life for as long as possible. Why would that need to change? But for the people that know they have no prospect of recovery and decide that they want a painless dignified exit (not choking on their own fluids or rotting away in a zombie state) why should they be denied that kindness? Or (perhaps worse) be left begging other people to risk breaking the law to help them?