When taking creams, different people have different physical conditions and different absorption and digestion of the creams, and therefore, different therapeutic effects are obtained. In order to get good results from taking the cream, it is crucial to be able to fully digest and absorb the cream. If the patient’s spleen and stomach are poorly transported, with poor appetite, thick and greasy tongue coating, and chest congestion, taking the formula at this time will not only increase the burden on the spleen and stomach, but will also affect the digestion and absorption of the formula, resulting in various discomfort symptoms, not to mention the efficacy of the formula. Therefore, before prescribing a cream formula for this group of people, doctors prescribe some herbs to transport the spleen and stomach, regulate qi and resolve dampness, so as to improve the function of the spleen and stomach of these patients and create favorable conditions for the digestion and absorption of the cream formula, so as to increase the efficacy of the cream formula. This kind of herbal medicine taken before taking the cream formula is called “open road medicine”. In addition, the “open road medicine” can also be used to prepare for the doctor to prescribe the right kind of poultice by observing the reaction after taking the medicine through a trial tonic. For people with normal function of spleen and stomach, they do not need to take “open road medicine”, they can directly take poultices to achieve the purpose of timely tonic. Generally, the “open road medicine” soup prescribed by doctors according to clinical symptoms is the most targeted and usually taken 2 to 3 weeks in advance, but of course this also varies from person to person. In addition, in addition to tonics, some proprietary Chinese medicines can also be taken under the guidance of doctors as “open road medicine”, such as Huo Xiang Zheng Qi Tablets, Xiang Sha Liu Jun Wan, Ginseng Bai Zhu Tablets, Jian Shen Wan, etc.