is it bad to drink more than 2 monsters a day?

There is a scary amount of sugar in them, I know I used to drink a load of relentless everyday then looked at the sugar content and thought OMG :| Just think about the amount of sugar in it and compare it to your daily allowance which i believe to be 90g for a woman and from looking on the internet a can contains around 52g of sugar so drinking 2 cans per day is 104g of sugar so you're already 14g over your allowance then you eat food as well so probably not the best idea. As i'm sure you well know sugar can lead to diabetes and other illness so it cut down a little, not saying entirely but limit it :)

Its sugar and water

plus it looks like pee

i work with people who survive off it

Drink a smoothie it will do you better

That's simply for you to decide and if you don't want much sleep! :L