When you're drunk, eating won't get you undrunk, true. The NEXT morning, when you feel like SHIT (ie hangover) the best thing you can possibly do is drink a lot of juice/water/gatorade and eat a lot of FOOD. You need food in your gut.
Ive found this to be true of almost any substance. Especially drugs like adderall - if you've been 18 hours on adderall, chances are you haven't eaten SHIT. Your body NEEDS food after this. It won't make you less speedy, or able to go to bed, but it will make you feel a HELL of a lot better when you wake up. That was my point.