Functions and indications of Roxithromycin include pharyngitis and tonsillitis caused by Streptococcus pyogenes; urethritis caused by Chlamydia trachomatis. Roxithromycin works by inhibiting bacterial protein synthesis, and is effective against bacteria such as gram-positive bacteria, Legionella pneumophila, Chlamydia pneumoniae, Mycoplasma pneumoniae, and Ureaplasma urealyticum. Clinically the drug is often used in the treatment of pharyngitis and tonsillitis caused by Streptococcus pyogenes; sinusitis, otitis media, acute bronchitis, acute attack of chronic bronchitis caused by sensitive bacteria, pneumonia caused by Mycoplasma pneumoniae or Chlamydophila pneumoniae; urethritis and cervicitis caused by Chlamydophila trachomatis; skin and soft-tissue infections caused by sensitive bacteria and other diseases. The main adverse reactions of this drug are gastrointestinal reactions such as abdominal pain, diarrhea, nausea, vomiting, etc. It is contraindicated for those who are allergic to this product, erythromycin or other macrolides. The use of antibiotics must be carried out under the guidance of a doctor, and it is necessary to pay attention to the occurrence of adverse reactions.