Azithromycin is divided into tablets, injections, etc., the common use of oral and IV, adults oral dosage of 0.25g ~ 1g each time, IV dosage of about 0.5g each time, the specific dosage to follow the doctor’s instructions. Azithromycin is suitable for acute pharyngitis and pneumonia caused by Streptococcus pyogenes, Streptococcus pneumoniae and other germs. For the treatment of sexually transmitted diseases caused by Chlamydia trachomatis or sensitive Neisseria gonorrhoeae, adults usually take 1g orally at a time.For the treatment of other infections, 0.5g is usually taken on the first day, and 0.25g is taken on the second to fifth days daily. If azithromycin is used intravenously to treat diseases such as pelvic inflammatory disease and community-acquired pneumonia, the adult one-day dose is around 0.5g. Azithromycin should not be used if you are allergic to azithromycin or erythromycin. Adverse reactions such as abdominal pain, nausea, vomiting and diarrhea may occur during the use of Azithromycin in some patients. Patients are advised to use Azithromycin under the guidance of a doctor and not to use the drug without authorization.