Cough medicine which good, which effective with its specific causes, individual differences and other factors, so there is no specific which drug good, which effective. The causes of coughing include colds, pneumonia, allergic coughs, etc. It is necessary to take the right treatment according to the specific causes of coughing in order to effectively relieve coughing. 1. Colds: due to viral attacks on the upper respiratory tract, nasal congestion, runny nose, sore throat, cough and other discomforts. For treatment, cold and flu granules can be used to relieve discomfort; cough suppressants, such as dextromethorphan, can be used for heavier coughs. 2. Pneumonia: mainly caused by pathogen infection, generally manifested as cough, cough sputum, chest pain and other discomforts. Treatment requires active anti-infection treatment. If caused by bacterial infection, can use cefixime and other antibiotics; if by mycoplasma infection can use azithromycin and other drugs. At the same time, you can take ambroxol, bromhexine and other cough and phlegm. 3. Allergic cough: caused by contact with allergens such as pollen and dust mites. First of all, you need to stay away from allergens, if the symptoms are more serious, you can use antihistamines such as loratadine, cetirizine and other drugs to relieve cough symptoms. There are many diseases that cause cough, including gastroesophageal reflux disease and postnasal drip syndrome. If the cough is repeated, it is recommended to consult a doctor in time to clarify the cause of the disease, and use reasonable medication under the guidance of the doctor, do not self-medication, in order to avoid delaying the condition or the emergence of adverse drug reactions.