Officially no. It's actually something Ozzy was involved in the campaign for. There's a religious crowd who freak out at the very idea. No government has yet had the will to push updates past them.

There are however doctors who will happily make a pain med prescription that is "incompatible with life". If the patient happens to die, while dealing with the pain, well at least they weren't in pain.

I believe the police also have a similar mindset. They won't look too deeply, if they suspect it happened that way, with the patient's consent. They do have the shadow of Harold Shipman hanging over them however. They missed a serial killer for years, since he was targeting OAPs.