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Since a hundred years ago, Seirogan (正露丸) has been a common household remedy used in many homes. Its main ingredient is Japanese pharmacopoeia wood distillate (a naturally effective component), which can adjust the balance of water in the intestines without stopping intestinal movement, thus exerting its effects. It is particularly effective for gastrointestinal discomfort caused by food or drinking, as well as for soft stools and diarrhea due to indigestion, mental stress, colds, and other related issues.