Hi Thanks for posting on HCM Apart from GERD and allergy, there are many other possible medical conditions that may give you chronic cough.Some of these causes may include: -Asthma -Blood pressure drugs like ACE inhibitors -Chronic bronchitis -Chronic obstructive pulmonary disease -Bronchiectasis -Lung cancer -Sarcoidosis..... I will suggest you see a lung specialist(Pneumologist) since your GI Doctor and ENT might not have eliminated these causes yet.The Pneumologist will have to evaluate your respiratory functions with test like spirometry/peak flow test.You may also need a chest X ray, CT scan and sputum exam. In the meantime, i will suggest you try the following: *Continue with Protonix for your GERD related problem *Take a bronchodilator like seretide *An anti-histamine like premalan *A steroid nasal spray *Take enough water *Exercise regularly *Eat healthy foods *Avoid smoke and air pollution Your Lung specialist may plan more objective treatment options after investigation Hope this will help Best regards