Regulating qi to relieve distension and harmonizing the stomach to alleviate pain. Used for chest and abdominal distension and discomfort, as well as gastric pain. The contained aescin has anti-inflammatory effects; the decoction of horse chestnut can significantly inhibit gastric acid secretion and provides notable protection against gastric mucosal damage related to gastric acid; it also exhibits significant spermicidal activity in vitro.