Make sure and check for LPR, you would be suprised how common this problem is
Chronic cough is a very common problem. It can indeed be caused by allergies, but also by many other causes. This can be the result of a chronic inflammation of the sinuses either from an infectious or noninfectious cause. It could be from a nonallergic inflammation of the upper airways called vasomotor rhinitis. Also this could even be from chest involvement such as asthma that often presents as a morning cough. The fact that you have no response to Claritin