My Mother is being having persistent cough from more than 3 months. It is more of dry cough that occurs sometimes and during sleeping at night. She is diabetic and BP patient. She has no fever or fatigue. She has a recent like 2 months ago stent procedure for RCA Artery in forties Hospital. She takes ramipril 10 mg, cardivas 6.25 mg, ecosprin 150 mg, clopidogrel 75 mg, thryoxin 100 mg and Insulin daily. She has done Chest X-Ray which doctor says is normal.