Interesting thread.
I'm what you might consider a "qualified medical professional."
When we were together, he made the call to to in a couple times, all of which led to prolonged hospitalizations for medical issues related to his drinking.
There was only 1 time I insisted, and it was during a time he professed to be sober, but was acting very drunk. I simply announced that if he hadn't been drinking, he was clearing having some sort of metabolic catastrophe (he was diabetic by this point) and we were going in because I wasn't comfortable with him staggering around. Besides, I could think of a half-dozen problems it might be, despite what we both knew it would be. Halfway there, he started confessing, and 2 beers became 6, and it was yet another nail in the coffin on the marriage.