Azithromycin antibiotic drug. Packet and blisterpack of four 250 mg tablets of the drug azithromycin. The packet includes Braille labeling. This drug is a macrolide antibiotic, and is most often used to treat bacterial infections of the respiratory tract such as tonsillitis, throat infections, laryngitis, bronchitis, and pneumonia. It was developed in the 1980s at the Croatian pharmaceutical company Pliva, and is now marketed under a wide variety of brand names worldwide. This packet is a generic form of the drug, marketed by the British pharmaceutical company TEVA.