I don't recommend this unless you know what you're doing, but I used to drink on phenibut. I didn't even have to drink much while on phenibut because it made me drunk much quicker.
Fast forward years later and now phenibut completely blocks alcohol. Like after I take phenibut now, I feel absolutely NOTHING from drinking, it blocks my buzz. Even if I drink an entire bottle. It's a waste. Nowadays I have to make sure there is no phenibut in my system or I won't get drunk at all. That's a huge contrast from feeling drinks more while on it to feeling nothing at all...no matter how much you drink!
Same with Klonopin. I used to love to combine phenibut with it to enhance my Klonopin high. Now I feel NOTHING from the Klonopin I took while on phenibut. Basically that Klonopin was a waste and I'm pissed because phenibut blocked it.
So it's interesting and infuriating to see how long term use with phenibut totally blocks out any other substance.