Zathrin (Generic Azithromycin Dihydrate Tablets) is used to treat many different types of infections caused by bacteria, such as lower respiratory tract infections, upper respiratory tract infections, skin infections, ear infections, chlamydia trachomatis conjunctivitis and trachoma, prevention of infection due to mycobacterium avium-intracellulare complex (mac) disease, acute streptococcal pharyngitis/tonsillitis and sexually transmitted diseases.