If you are experiencing dehydration caused by alcohol, it is not usually necessary to go to the emergency room unless you are unable to keep fluids down after several hours. In most cases, slowly consuming liquids such as soups, rehydration solutions, and water should help alleviate the dehydration. However, if vomiting persists despite these efforts, it may be a sign that medical attention is needed. Typically, emergency room visits for alcohol-related dehydration are most common in cases where the individual is unconscious and unable to drink fluids, requiring intravenous fluids to be administered.