Seven prescriptions refer to seven prescriptions with their own characteristics in combination and clinical application. "Su Wen? The most important truth says that "the weight comes first, then the size", which is the precedent of prescription classification. It was not until the Jin Dynasty that Cheng Wuji's Treatise on Exogenous Febrile Diseases was defined as seven prescriptions, and it was regarded as a cubic criterion. Generous microgravity, suitable for those with strong pathogenic factors and concurrent diseases, such as Dachengqi Decoction. Small square tastes little and the amount is light. It can cure the upper energizer disease by taking it orally for many times, and it is suitable for the disease without symptoms, such as onion and black bean soup. Slow prescription, many medicinal materials, light taste, can attack evil spirits slowly, or cure the root cause with slow medicine. Suitable for chronic weakness, such as Sijunzi decoction; Acute prescription has a strong smell, strong medicinal properties and quick cleaning effect, and is a prescription for treating acute diseases and serious diseases, such as Sini decoction, which can restore yang and save inverse. In addition, the odd prescription is called the odd prescription, which is used to treat diseases with simple causes; My prescription is called my prescription, which is used to treat syndromes with relatively complex etiology and requires more than two main drugs. The so-called compound prescription refers to the combination of two or more prescriptions, which is suitable for complex diseases or chronic diseases that cannot be cured for a long time. Liu believes that the odd-even combination of seven prescriptions reflects seven different methods of treating diseases, which can be called the standard of treating diseases. Because of the ever-changing diseases and different symptoms, clinical prescriptions should be flexible.

The prescription for the main symptoms is called the main prescription.