Zimax 200 mg/5 ml Powder for Suspension is an azalide antibiotic, a subclass of the macrolide class. It hooks to the 50s ribosomal subunit of susceptible organisms and thus interferes with microbial protein synthesis. It demonstrated activity in vitro against a wide range of gram-positive and gram-negative bacteria, including Staphylococcus aureus, Streptococcus pneumoniae, Streptococcus pyogenes (Group A), and other Streptococcal species, Haemophilus influenza and poronfluenzar Moraxella catarrhalis, anaerobes including Bacteroides fragilis, Escherichia col Bordetella pertussis, Bordetella parapertussis. Borrelia burgdorferi Haemophilus ducrey Neisseria gonorrhoeae and Chlamydia trachomatis. Azithromycin also demonstrates activity in vitro against Legionella pneumophila, Mycoplasma pneumonia, and hominis: Campylobacter sp Toxoplasma gondii and Treponema pallidum.