Hi Thanks for posting on HCM Poor response of cough and congestion to cough and congestion medications is likely because the underlying cause has not been touched.Treatment will however depend on cause.Possible causes may include: -Lungs infection(pneumonia, TB...) -Chronic bronchitis -Other upper respiratory tract infection -Asthma -Gastroesophageal reflux disease -Blood pressure drugs like ACE inhibitors if on any. -Less common causes like Bronchiectasis, Bronchiolitis, Lung cancer, Sarcoidosis.. There are just many possible cause.I will suggest you get a chest x ray and a sputum exam.Your treatment will depend on findings.I will advise the following: *Take an anti-histamine like premalan *A mucolytic like carbocysteine 5% *A steroid like prednisolone for about a week as chronic use is not good to limit side effects *A bronchodilator like salbutamol spray if you are obstructed *Drink enough fluids *Moisturize the air *Avoid tobacco smoke, dust and cold *Your Doctor may prescribe you antibiotics if any arguments in favor of a bacteria infection.Your chest x ray and sputum exam will help here. Hope this will help Best regards