Azithromycin for bronchitis, adults take 0.5g once a day for 3 days; children are given according to their weight. Azithromycin is a macrolide antibiotic, which can inhibit bacterial protein synthesis to play an antibacterial role, effective against a variety of bacteria, especially special pathogens such as Chlamydia pneumoniae, Mycoplasma pneumoniae and other infections caused by the above susceptible pathogens for respiratory infections caused by the above, genitourinary tract infections and so on. When Azithromycin is used to treat bronchitis, adults should take 0.5g once a day for 3 days; children should be given according to their body weight, using a total dose of 30mg/kg, up to 1.5g, and given once a day at a dose of 10mg/kg. Azithromycin is contraindicated in people who are allergic to macrolides, and is also contraindicated if there is a history of cholestatic jaundice and hepatic insufficiency following azithromycin use. Azithromycin often causes abdominal pain, nausea, diarrhea and other gastrointestinal discomfort, but also can cause dizziness, headache, rash, itching, angioedema and other adverse reactions. It should be used under the guidance of a physician, and if there is any discomfort, seek medical advice promptly.