[deux ex machina]

Please forgive me if this comes off a bit convoluted.

For those who don't know, my ex has NPD.
The relationship imploded in a nasty way.
Surprise.

Since everything fell and went boom, his true characteristics have surfaced more and more - he sees no need for a facade any longer.
Except sometimes, in small moments.
Every new break is killing me.

Even though I know this is really him, it's still very distressing to me.
I loved him greatly, am guily of being a romantic.
I hate that part of myself at the moment.

He stops by. He's drinking, beer. He's also on antidepressants.

Just in case this is important: he is very thin, and rarely drank before.

I don't believe he had too much to drink, but the way he acted was very bizarre, almost manic.

My question is: even if one doesn't drink a large quantity of alcohol, is drinking while on anti-ds a dangerous thing for him to do?