I don't think they would make doping get you a blue tongue, lol. Seriously, the rules in football considering doping are not as strict as in cycling for example. Or at least football players aren't hunted 24 hours a day. But it's known that lots of them take creatine, which is legal, but it's retarded imo. Because creatine actually helps producing less acid in your muscles, while lots of products to help you when you have a cold are strictly forbidden. I don't see how they can allow creatine when you can't even take a cough medicine or nasal spray.
they drink that blue stuff