///woofgang Barsel, their doctors are supposed to.///
Only if their doctors know.
My cousin was an alcoholic, a chain smoker, and had a bad heart
He went to the doctors once and because he didn't like what he was told, he never went again.
He carried on driving until the day he had a fatal heart attack while he was driving, but fortunately he had pulled over because he felt unwell.
If he hadn't have done that, then other people could have been injured including his young son who was in the passenger seat.