《伤寒论·辨阳明病脉证并治法》
服第一次药应当解大便，如果服药后大便不解，可将剩下的药服完，如果大便已通，不要再服剩下的药。
初服汤，当更衣，不尔者，尽饮之；若更衣者，勿服之。
When taking the first dose of medicine, it should be relieved. If the bowel movement is not relieved after taking the medicine, you can finish the remaining medicine. If the bowel movement is already normal, do not take the remaining medicine.