Pediatric chemo-cum-anti-cough oral solution, the instructions do not clearly indicate that there are adverse reactions that cause bronchial asthma. Therefore, it is considered unlikely that the drug will cause bronchial asthma. The oral solution is composed of hawthorn, betel nut, Citrus aurantium, loquat leaf, piper betel, and lycopodium, etc. The formula itself has the effect of relieving cough and asthma, and it is mainly used for children with phlegm-heat syndrome of food accumulation and cough. Adverse drug reactions are not clear, not clearly indicated that there is no role in causing bronchial asthma. Bronchial asthma is a common chronic respiratory disease in children, the etiology is complex, the pathogenesis is not yet completely clear, and is considered to be closely related to immune, neurological, psychiatric, endocrine factors, genetic background and neural signaling pathways. Therefore, it is unlikely to consider the possibility of bronchial asthma triggered by pediatric chemo-cum-oral solution.