Chinese herbs are generally not washed before use. If you feel that there is sediment is not clean must be cleaned, but also just quickly over the water, commonly known as “grab water wash”, rather than repeatedly wash. 1, some herbs can not be washed: such as mint, fishy grass and other traditional Chinese medicine, dip washing is very easy to lose the active ingredients. In addition, many herbs contain sugar and glycosides, soluble in water, after washing will lose part of the active ingredients, resulting in reduced efficacy. 2, water washing can make the powder type herbs lost: many Chinese herbs are powder, such as Pu Huang, Zao Xin Tu, talcum powder, etc., such as water washing, will cause the loss of these herbs. 3, water washing can cause the loss of some herbs auxiliary materials: some herbs in the process of preparation added honey, wine, bile and other auxiliary materials, these auxiliary materials are easily soluble in water, if water washing, it will lead to the loss of some of the auxiliary materials, such as roasted licorice, bile South Star, wine rhubarb, etc.. In addition, the tablets usually need to go through the concoction process, including cleaning to remove impurities, drying and a series of procedures, after a long period of high-temperature decoction, a little sedimentation, remove the dregs, can be safely taken.