Dear friend, welcome to HCM.
H. parainfluenzae is a respiratory pathogen and causes respiratory tract
is a good antibiotic and also as per sensitivity testing in your case.
You are advised to complete the prescribed course of it, as partial treatment could progress with worsening to pneumonia
or development of bacterial resistance.
I hope this helps. if symptomns persist, you may get a Xray chest done.
I hope I answered your query and it helps.