Azithromycin dry mix is indicated for infections caused by Gram-positive and some Gram-negative bacteria and Chlamydia mycoplasma: bronchitis, pneumonia and other lower respiratory tract infections; skin and soft tissue infections; acute otitis media; sinusitis, pharyngitis, tonsillitis and other upper respiratory tract infections. Azithromycin dry mix is available for children, and when treating childhood infections with azithromycin, it is recommended that its total dose should not exceed a maximum of 1500 mg. For childhood streptococcal pharyngitis, azithromycin single dose of 10 mg/kg or 20 mg/kg, taken for 3 consecutive days, should not exceed 500 mg per day, where bacterial clearance is stronger with a 20 mg/kg/day dosing regimen. Of course, penicillin is still the drug of choice for the routine treatment of septic streptococcal pharyngitis, including prophylaxis for rheumatic fever. Azithromycin for the treatment of infections other than streptococcal pharyngitis alone has the following two dosing regimens: (1) a total dose of 30 mg/kg for children, administered once daily for 3 consecutive days at a dose of l0 mg/kg; (2) a total dose of 30 mg/kg, administered once daily for 5 consecutive days at a dose of l0 mg/kg on day 1 and 5 mg/kg on days 2 through 5. For children of different body weight and age, the following dosing method of Azithromycin dry suspension (total therapeutic dose of 30mg/kg) can be referred to. Children weighing less than 15kg and aged 1 to 3 years old should take l00mg orally once a day for three days. Children weighing 15 to 25 kg and aged 3 to 8 years old. Three-day dosing method: 200mg once a day by mouth for three days. Five-day dosing method: 200mg once orally on the first day, and l00mg once orally on the second to the fifth day. Children’s weight is 26 to 35 kg, and age is 9 to 12 years old. Three-day dosing method: 300mg orally once a day for three days. Five-day dosing method: 300mg orally once on the first day and 150mg orally once daily on the second to fifth days. Children’s weight is 36 to 45 kg and age is 13 to 15 years old. Three-day dosing method: 400mg once daily by mouth for three days. Five-day dosing method: 400mg once a day orally on the first day, and 200mg once a day orally on the 2nd to 5th days. For children weighing more than 45kg, the dosing method and dosage are the same as those for adults.