i'm taking the sats next friday (with adhd), i need a quick fix focus my concentration on it when i work on it. are there any drinks i should take into consideration? redbull? caffeine?

Mostly I'd be looking to be properly hydrated with good clean water. I'd be wanting to have days of a lean diet and no over eating behind me. Lots of sleep and a positive attitude. Drugs aren't everything.
Good luck with it. Ian.

what should i eat the days before? tuna sandwiches? ha? or what? nothing fancy though i'm a teenager inept at cooking. arent there any drinks to help improve concentraton i can drink the morning of it?

If you aren't accustomed to eating a balanced diet then a crash course is likely to mess you up before an important date.

Just go with it. Don't change a thing. Just get enough to drink, eat what you normally do.

I'm sure there would be someone willing to sell you a "super" drink to assist you in your tests but frankly it's business and the machine you already own (your mind and body) do quite well on their own given half a chance.

Exercise and a balanced diet are good. Maybe "Red Bull" or any of the "performace" drinks I see at the convenience stores would work for you but I'm a skeptic so prefer to use what I was born with first.
Cheers! Ian.