When I was in college, I could, like most of my cohorts, drink way too much, sleep well, and function in the morning. In this millennium, I find more and more that if I have more than 2 drinks, even if they are spaced out and I do my best to drink lots of water, I end up waking up in the middle of the night, wide awake, heart pounding, super thirsty. Does this happen to other people, and can anybody explain why it happens? Is it just part of the metabolism changing with age? - I'm late 30's and I've noticed this trend over the past few years. What gives? Now, I'm not considering this a serious medical problem, just really annoying, I'm curious as to what is going on physiologically and of course what I can do to prevent it. Not that I plan to drink like a 21 year old ever again, but every now and then it would be nice to be able to have a 3rd glass of wine AND a good night's sleep!