Originally Posted by DarkSideMoon

It’d have to be pretty extreme but I knew people in college who could drink 20-30 units of alcohol a night. That would be alcohol poisoning, borderline fatal to a non-drinker, but your body does adapt to chronic alcohol use. (I know that number sounds insane, but if you look at some DUI arrests .3-.4% is not uncommon.)

That’s going to take a long time to process at approximately one unit an hour.

No excuses, if you choose to drink before duty you need to make sure you’re fit in the morning, but for a hard drinker it would be possible to quit 12 hours before show time and still be drunk at the airport. I’ve met people that use 8/10/12 (whatever the company minimum is) as their only guideline and this is one way that line of thinking can bite you.