Drinking alcohol was in effect allows the body to drive the liquid coming out than normal. The quantity of liquid or water in the body, reduced. An imbalance occurs, causing dehydration and Auntie will be low blood pressure.
They drank too much alcohol, body fluids come out more than the usual amount of liquid or water in the lower body is not balanced, the lack of water, and then my aunt, there would be a low blood pressure.