What Is The Purpose Of Azee While Suffering From Pneumonia?

Hi drs, My father us suffering for pneumonia as pwr dr also they did swab test and result awaited. But for now father is having trouble in breathing once they started walking. While sleeping on bed and sitting they dont have any problem. Drs are giving medicine for pneumonia and swine flu too. Now they prescribed T azee 500 for 3 days. In pneumonia breathing problem is for how much day last? Whats tablet azee 500 do?