Thanks for the query to H.C.M. Forum.
don't causes any pain.
Since the patient is feeling pain on the right side of lung with difficulty in breathing , prescribed prednisolone
+ Z pak .
History of smoking
is there , so assessment of case is necessary.
Since , from how many days your friend having bronchitis , please mention?
If pain is severe and also with breathing then consult a physician and get his opinion along X ray chest as might have , pneumonitis
or consolidation of right lung.