Hi doctor, My wife Aged 37 years is consistently suffering from persistent dry cough, She has been diagonised with allergic bronchitis. She is on budecort 1 mg and levolin respules 0.63 mg, Montair LC, and Doxofylline 400 mg with little or no relief. She don t have any history of bronchitis and her current situation is terrible. She keeps on coughing endlessly entire day and out. Please let me know how long the current medication may need to be carried on and as to if i am on right course of medication?