I'm Worried About My Husbands Drinking. He Just Turned 64

I'm worried about my husbands drinking. He just turned 64 years old and has been hospitalized about 4 times in the past 4 years for things as hypertension, mini strokes along with a seizures. He claims that he only drinks about 1/2 pint of vodka with orange juice per day but I'm not sure he's being honest. He has a standard appt. tomorrow with will include a basic blood test. Will this help clear things up?