Hello, Radix Rehmanniae is Chinese medicine, and Radix Rehmanniae is dried. Rehmannia charcoal is a processing method of Rehmannia glutinosa, and it is not directly burnt into charcoal. It is recommended to run more pharmacies or consult a doctor to switch to other drugs. The "Encyclopedia of Diseases" column of Relieved Medical Network has various disease topics, and introduces the etiology and pathogenesis, examination and diagnosis, treatment methods and prevention and health preservation of various diseases in detail.