My daughter has dry cough regularly..mostly in winter months. She was diagnosed woth upper respiratory bronchial allergy . Earlier she would cough as soon as she went to sleep and would cough through the night. Now she s better, but some conditond like enhsnced allergens, throat infection , etc. What should i give her? doctors hsve been prescribing steam, cough syrups, budecort inalers, levolin syrup.