Sudden Never Before Siezures

My husband is 54. He is a closet drinker and has spent most of his adult life every other day drinking about a half pint of vodka at a time. One day hung over one day drinking. The amount is as far as I know but the every other day is for sure.
2 weeks ago he was drinking and taking a nap, I went in the room to talk to him we talked briefly, he got up walked to the door and all of a sudden he started shaking all over his body, his arms went rigid his eyes glazed over and he fell down. Not like you normally fall down, he did not put his arms out or anything to break his fall but fell over stiff like a bowling pin. He continued to shake on the floor and was non responsive for about 10 seconds. When it was over he got up and asked what I was cooking for dinner.
I tried to tell him what happened and he gave me the stock answer “don’t worry about it”
a week later he was in a meeting and as far as I can tell by witnesses he had another episode but this time he was sitting down but had the same shaking and rigid no responsive behavior. His secretary was so shocked and upset by the whole thing she was crying. She drove him home and I could not tell if he was drinking or not.
He is on blood pressure pills benicar hct, that’s it
2 weeks ago he had a yearly physical and everything was fine except for an ear infection he received amoxicillin for.
I called his doctor when he had the first one and he never called back. When my husband went in for the results of the physical the doctor said it was probably the ear infection but I don’t know what my husband told him happened because as far as he is concerned nothing happened.
I called his doctor yesterday when he had the second one and his assistant said they don’t deal with that kind of thing and she would make an appointment with a neurologist and it is now the next day and I still have not heard from her.
Are these episodes seizures?