There may be more to this story than is written. If he has a CDL (commercial drivers license) he is required to have a medical examiners certificate that verifies he won't have a heart attack or siezure while driving a 90,000 lb. tractor trailer. If he has a heart condition that is uncontrolled and is a heavy drinker, then they are following the law by reporting. If it's just a class c (ordinary) drivers license then this is a bit ridiculous.
The man lives in Lebanon, PA, about 20 miles east of Harrisburg. The story from the AP is all screwed up, what's new.
After work he goes to a bar and drinks a six pack then he goes home and drinks about 12 more beers. He is a big man and can handle it. He goes to work and does his job completely sober. He is now suing the doctor, as he should. The man admitted he drinks 12 to 18 beers a day to his doctor. But he does not drink and drive. And he paces himself after work at the bar to make sure he is NOT drunk. He stays late at the bar, around 11-12 and is sober when he drives.
This is a typical example of AP messing up a story.