I have a girl child of 2years 10 months, she is around 19 Kgs. She is generally very healthy and active but for the last 15 days her cold and cough seems to persist. The doc checked and adviced cough surup,, frst piritron and if that di not show any results switch to Koflet, so we did. But its been another 5 days and the cough is getting worse. Can we give her Azitrhal 200mg (5ml) for 3 days? will that help?