Not till they tear the pen from your cold dead hands.
One author to another, even if it's a word a day, a sentence, anything.
Do not give it up.
My health failed me and I lost ten years. But I fought and got it back, and that is something I won't give up as long as I can.
Retirement from active writing is fine, but don't give it up. I feel you, I hear you, I am just telling you, your gift is worth the fight.
If you have to, I understand and support you, but if you can fight, do so.