1. the drinks do work, but kinda fuck with your abilty to absorb vitamins afterward, but only for a shortwhile. you'll feel really bad and the drink, it'll taste really bad as well, but if you really want the job, it'll be worth it i guess.
2. if you don't have money, drink a lot of water and try and take as many supplements you can find. go to friends house and steal his parents vitamins and take a shit loard of them the night before. it'll fuck you up and you'll be in some serious stomach pain, but when you wake up, it'll be gone and your urine will be neon. keep drinking water after this point, until you pee clear, and your system is clean. you got to a shit ton of vitamins, as all the drinks are this, just a large large dose of vitamins at once. mainly b and niacin, as somebody already mention. niacin deads the effect of thc over a short period of time, doesn't really get rid of it, just kinda nulls its effects.
3. fuck working at cvs.