The cough is occuring again and again because her asthma is not adequately controlled. She can be given a short course of steroids
along with inhalers like seretide
or foracort. Once breathlessness and cough are controlled, oral steroids should be tapered off and inhaler medicines continued as these have hardly any side effects. She can continue deriphyllin
and montair lc. Before all this, have a chest x ray taken to rule out any other pathology.