Description: Azithromycin is a macrolide class of antibiotics. It acts by binding with 50s ribosomal subunit of susceptible organisms and interferes microbial protein synthesis. It acts against a wide range of Gram-positive and Gram-negative bacteria including Staphylococcus aureus, Streptococcus pneumoniae, Streptococcus pyogenes (Group A) and other Streptococcal species.