Back in 1987 an inebriated HR lady at my company told me that they ran an extra test during the pre-employment drug screen which identified nicotine. If it was positive then management really had to work hard to justify the hire.
I worked at a university where the lady catbert was a heavy drinker.
One commonly known event was her coming to work in a long coat with last night’s lingerie on underneath and wreaking of the sauce on at least one occasion.
She would change in her office and take a couple of hours to sober up.