Thank you all for your kindness.
His condition has taken us all by surprise as he didn't display any of the typical symptoms, he just started falling down one day.
Dan, yes, my GP did prescribe tobacco. He's retiring this year and is enjoying a laissez faire attitude in our dealings, he's also a friend.
Fluffie, my dad is an artist, a fancier of the green leaf and a now a Mass state resident. They legalized growing for your own use last year. I think even with out this my parents would be spending a lot of time in the garden this year!
Jitterbug, thanks for the research fodder. I have a feeling fasting will be a natural consequence, unless he does indulge in that other piping.