1, it is generally recommended that the decoction time of Siwu decoction is about 40 minutes after boiling, and each medicine is boiled twice.

2. It needs to be soaked in cold water before boiling Siwutang, so that the effective components of the medicine can be fully fried. The soaking method is to put the medicine into the casserole before decocting, and soak it in clean cold water. The appropriate amount of water is to submerge the medicine surface for 3-5cm, and the appropriate soaking time is 30 minutes. Short soaking time is not conducive to the release of drug components, while long soaking time is easy to deteriorate the drug. Each medicine needs to be boiled twice. For the first decoction, the medicine should be boiled with strong fire, and then the medicine should be kept boiling for about 40 minutes with medium and low fire. After boiling, pour out the decoction 1 and add water to boil it for the second time. The method and temperature are the same as above.