Thanks for asking at Healthcare Magic. I read your question and I understand your concern. Productive cough is common in chronic and acute bronchitis, asthma, bronchiectasis, upper respiratory tract infection, pneumonia, GERD. There is no such respiratory disease with productive cough in which long term steriods like prednisolone are needed. Only intersistial lung disease, Caplan syndrome needs long term steriods. Your doctor may have prescribed you it for three to four weeks and now he will tappering it. I would like to advise you to have Chest Xray followed by CT chest if chest Xray was abnormal. pulmonary function tests and Xray Paranasal sinuses. Hope it helps best. Take your best care. Don t forget to rate this answer and close the discussion at Healthcare Magic. Regards Dr Ejaz