text: You never mentioned what your symptoms were. The only reason I can think of your getting the shot would be for vomitting ( it will dehydrate you), and it was a shot of finegrin. It numbs an upset stomach to calm the nasea. Also, if you were dizzy and dehydrated, a doctor will administer the same for precaution to keep you from vomiting. How much you drink does not mean that's how much your body would retain. As far as his tone and the words he chose, there he was wrong. The rest he was probably correct. If you were dehydrated too much he would have put you on an IV. My opinion is that the shot was a precaution to save you the burden of an IV.