Hello, normally in infections we do not prescribe steroids But if you need a symptomatic relief then you can take it. but better is take oral medication as steroid injection will take a week to build up and then the effect lasts for 3-4 weeks. Steroid tablet can give you better short term relief and in less dose. In addition Azithromycin is not meant for lower respiratory tract infections ,,, you can take Levofloxacin. Take Cough syrups for symptomatic relief take mucinac tablet And also can use Xylometazoline nose drops to decrease nasal congestion.