Clarithromycin extended-release tablets are mainly used for the treatment of symptoms of infections caused by bacteria that are sensitive to this drug. Clarithromycin extended-release tablets, the main ingredient of which is clarithromycin, can usually be used for the treatment of pneumonia, bronchial and other lower respiratory tract infections; it can also be used for the treatment of pharyngitis, sinusitis and other upper respiratory tract infections; at the same time, for the hair folliculitis, dengue (acute infections, the skin can be seen to redden like paint), cellulitis and other soft tissue and skin infections, such as mild and moderate infections, it is also possible to play a certain degree of therapeutic effect. Clarithromycin is generally well tolerated, but a small percentage of the population may experience adverse reactions such as taste disorders, headache, vertigo, anxiety, dizziness, diarrhea, vomiting, insomnia, tinnitus, disorientation, psychosis, hallucinations, and personality disorders. This drug is contraindicated in people who are allergic to this product or other macrolide antibiotics and their excipients, children under 12 years of age, patients with a history of prolonged QT intervals or ventricular arrhythmias, etc. This drug should be used with caution in pregnant women and during lactation. If there is any discomfort promptly consult a doctor, the drug should be used cautiously under the guidance of a doctor, do not take the drug without authorization.