Azithromycin is a common antibiotic that is effective against mild or moderate respiratory, urinary and genital infections and should not be taken three tablets at a time. Azithromycin is a macrolide antibiotic that is effective against respiratory and genitourinary infections caused by Mycoplasma pneumoniae, Chlamydia pneumoniae, Haemophilus influenzae, Streptococcus pneumoniae, Chlamydia trachomatis, and Neisseria gonorrhoeae. It is effective against pharyngitis, otitis media, tonsillitis, bronchitis, community-acquired pneumonia, urethritis and cervicitis caused by the above bacterial infections. Azithromycin tablets are generally available in the size of 0.25g/tablet, and the dose for adults can be used up to 0.5g~1.0g, or 10mg/kg in case of children, to be taken orally once a day. You need to read the specifications of the drug before using it, and take different dosages of the drug according to different diseases and follow the doctor’s instructions. Azithromycin belongs to the antibiotic, can not be used arbitrarily, need to follow the doctor’s instructions for medication, blindly indiscriminate use may lead to serious consequences.