This can mean an ambulance ride. Alcohol's effect on blood sugars is complex and unpredictable. As Dr. Juliano reports, this can lead to real problems. In some individuals the sulfonylureas react with the alcohol, producing a brightly flushed complexion. People consume alcoholic beverages for many different reasons, and those reasons usually determine their drinking patterns.
Alcoholic beverages impose a new risk on the diabetic, who already has a lot to juggle.
It is up to each individual to make an informed judgement about how much of that risk is appropriate, so talk to your doctor about how to drink safely.