My 3 year old daughter has a persistent cough which is keeping her awake at night. During the day we have sprayed with a saline nasal spray which seems to be loosening the mucus and allowing it to be discharged through the nose when sneezing. We do have a neublizer at home and Duolin for our 5 year old son. Would it be appropriate to give this to her? If not what can we do to make it easier for her to have a peaceful sleep? We have had her at the Dr twice in the last 2 weeks. First time she had a viral infection and had a course of anti-biotics. Second time she was running a high temperature and the Dr said that she had full blown flu, prescribed rinex and pain medication. Has started vomiting and dirohea since.