If someone had a stroke just be careful, remain calm, and read this.
https://www.pritikin.com/had-a-stroke
Then do it. Fun part is doing it when you're depressed because you had a stroke. Spoilers, it's generic health stuff. Excercise, not smoking, eating right, so on and so forth.
Lastly, that's actually fine for what you're dealing with, sometimes you need to put the foot down and force people to do certain things or else the world ends.
But yeah. If person needs time give time. Some people need to yell into the pillow for a while. Just make sure they do that meanwhile or after. Though you're right that you'd need to be tactful about it.