拉肚子不需要预防，出现问题后非处方药见内

In most cases, over-the-counter medication can be helpful in stopping an occasional bout of diarrhea — especially traveler’s diarrhea, which may result from ingesting contaminated food or water while abroad. Over-the-counter options include Imodium (loperamide) and Pepto-Bismol or Kaopectate (bismuth subsalicylate). “These are reasonable to use on occasion and have the great advantage of not requiring a doctor’s prescription,” Bickston says, adding that they should not be used for more than two days.