Now that is thinking out of the box. I'm impressed. It's something I'll run with.
How long has he been celebrating? Last ate, and what? Is the beer green? And if so, what did they use to turn the beer green, if not food coloring?
Any other ETOH? BGL? If available, ETOH level. (I still think ambulances should have breathalizers, IMHO)
What does the monitor show? Allergies to meds and other allergens? How has is urinary output been, especially with the ETOH consumption?