I am an extraordinarily moderate drinker (the last alcoholic beverage I imbibed was a single beer in March), and I have a policy of never drinking in profession

I am an extraordinarily moderate drinker (the last alcoholic beverage I imbibed was a single beer in March), and I have a policy of never drinking in professional environments. I have hardly ever been pressured into it, and the few times somebody has become slightly pushy, I just mutter something about "being on medication" and they knock it off.