Loratadine does not treat enalapril-induced cough. Enalapril belongs to the angiotensin converting enzyme inhibitor, usually after taking enalapril will inhibit the kinase enzyme, which will lead to the reduction of bradykinin degradation, and this kind of substance will act on the smooth muscle of the bronchial tubes, which will make the smooth muscle of the bronchial tubes contracted, so there will be coughing and other discomforts after taking the drug. Loratadine is a histamine receptor blocker, which can counteract the contraction of bronchial and gastrointestinal smooth muscle caused by histamine. It is usually effective in treating symptoms caused by histamine-induced contraction of bronchial smooth muscle, which leads to coughing, while it is ineffective in treating symptoms caused by enalapril, and cannot treat coughing induced by enalapril. After taking enalapril symptoms of cough, it is recommended to stop taking the drug immediately and consult a doctor for a comprehensive assessment of the condition, and then give targeted treatment.