Clarithromycin is used for the treatment of acute bronchitis and other diseases, the duration of its use ranges from 5 to 14 days, care should be taken to avoid contraindications and monitor adverse reactions. Clarithromycin is mainly used for the treatment of mycoplasma and other sensitive pathogens pharyngitis, sinusitis bronchitis, dengue and other infectious diseases, if not specifically prescribed, the duration of adult medication is usually 6 ~ 14 days, children need to be based on body weight and other comprehensive judgment of the amount of drugs to decide, usually 5 ~ 10 days. In the process of using the drug, if there are adverse reactions such as abdominal pain, diarrhea, urticaria, hallucinations, etc., it is recommended to stop using the drug and inform the physician in a timely manner. The use of the drug is prohibited in cases of drug allergy, pregnant women, lactating women, severe hepatic insufficiency, cardiac arrhythmia, heart failure and other conditions. Clarithromycin needs to be used under the guidance of a clinician, and unauthorized use of the drug is prohibited.