Clarithromycin tablets belong to the class of macrolide antibacterial drugs and can be used for infections caused by sensitive bacteria, such as nasopharyngeal infections, lower respiratory tract infections, acute otitis media, skin and soft tissue infections. This product can have adverse reactions such as nausea, vomiting, abdominal pain, diarrhea, allergic reactions, drug rash, urticaria, hepatotoxicity, pseudomembranous enteritis caused by Clostridium difficile, etc. after administration. The antimicrobial spectrum includes bacteria such as gram-positive cocci, gram-negative cocci, Haemophilus influenzae, B. pertussis, Legionella pneumophila, Mycoplasma pneumoniae, Chlamydia, and anaerobic digestive cocci. Note that patients with severe hepatic impairment, hydroelectrolyte disorders, cardiac arrhythmias, Q-T interval prolongation, ischemic heart disease, congestive heart failure are contraindicated. It is prohibited for those who are allergic to this product and other macrolides, pregnant and lactating women. Patients must use the drug under the guidance of a specialized physician and strictly comply with medical advice.