Note that loose stools and diarrhea can be caused by many things, including stress, a change in diet, eating unfamiliar foods, eating too large a meal or one with too much fat, consuming too much alcohol, taking any of the 600 pharmaceutical drugs which list diarrhea as a side effect, or an infestation by a parasite like Giardia or Cryptosporidium - and may not necessarily be caused by drinking to