Hello When atmosphere changes there develops allergy and this is a characteristic feature of asthmatic allergic bronchitis . Because due to change in temperature and humidity person develops allergy , hence bronchoconstriction ,hence cough and cold . When such patient visit in my clinic I usually prescribe monteleukast+ levoceterizine combination tablet once or twice in a day till complete relief. But when patient don t get relief ( there is breathlessness or difficult breathing ) within 2-3 days , I prescribe them monteleukast+ bambuterol ( combo pack ) tablet once or twice in day till complete relief. Since this is a prescription drug so please consult a physician and get his prescription. Hope information will be useful for you.