Aurobindo Pharma got final approvals from the US FDA of azithromycin for injection USP, 500mg /vial and entacapone tablets. Azithromycin for injection USP, 500mg/vial is bioequivalent and therapeutically equivalent to the reference listed drug product (RLD) Zithromax (azithromycin for injection) 500mg/vial of Pfizer, Inc. Azithromycin for injection, USP is a macrolide antibacterial drug indicated for the treatment of patients with infections caused by susceptible strains of the designated microorganisms in the conditions such as community-acquired pneumonia and pelvic inflammatory disease.