so many stupid replies to this. It is NOT a steroid. And someone said take 3 before, 3 after? 3 What? The package will list the serving size, and the grams of Creatine delivered in that serving size. Typical use is 5 g 45-60 minutes pre workout, and 5g after.
Whey Protein, despite what someone else said, is not at all in the same category as creatine or other enhancers. Taking whey protein simply gives your body more protein, and is easier to consume than eating shitloads of beef, chicken, tuna, etc. You're supposed to get around 1G protein per each pound of lean body mass you have if you're lifting. This is difficult to do just eating food.
But back to creatine, if you're lifting on a consistent basis, and have gotten to a point where you are having trouble making gains, consider taking it. However, I wouldn't take it if I were under 17 or 18, and I would use reccomended doses. And yes, drink lots of water while on it, although you should drink a lot of water daily regardless, it's healthy.
Lastly, about alcohol, though I haven't read any specific problems caused by drinking while on creatine, it probably could be overloading your liver. But regardless, alcohol inhibits muscular growth, so if you're taking creatine and drinking regularly, you're negating the effects anyway.