I hate google noise (blogs, content farms) as I can't find a study from years ago which showed:

Study drunk, test better when drunk (lets say buzzed, most people "drunk" cannot function, its subjective in terminology).

Study sober, test better when sober.

You cannot mix it (in the study), IE: study drunk, test sober, study sober, test drunk.

Its a "duh" or common sense thing to me, brain functions being formulative to your current state of function.

I BELIEVE it was the University of Utah (which has a myriad of awesome drunk studies (cell phones vs >.08 alcohol levels, etc).