Si-Yi San is a proprietary Chinese medicine mainly used for the treatment of febrile syncope with no warmth in the hands and feet, epigastric (abdominal) dystocia (pain in the area of the coats of arms and ribs), etc., and is not generally used for the treatment of intractable coughs. Sihui San is composed of Chai Hu, Citrus aurantium dulcis (fried in bran), Paeonia lactiflora, and Glycyrrhiza glabra. It has the effects of dispersing heat, dredging the liver and regulating the spleen. It is mainly used for the treatment of heat syncope with no warmth in the hands and feet, epigastric and abdominal pain, dysentery and heaviness. The adverse reactions and contraindications of Sibiisan are not clear, drug interactions may occur if used concurrently with other drugs, please consult your physician or pharmacist for details. If you have a persistent cough, it is recommended that you seek medical attention in a timely manner to standardize the treatment, and not to use medication without authorization, so as not to delay the condition.