<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi I have had a chesty cough for 8 weeks now. I cough all the time and I am still coughing up dark green phlem. My breating does get very shallow. I am also asthmatic and I have increased my inhalers but my peek flow reading is 250 when usually it is 450-500. I have had 2 courses of antibotics: Amoxilin and Ethrithromicin sorry about the spelling and still it is no better. I feel tired all the time and cant sleep well due to my wheezing. What do you hink could be the cause? I know I have to go back to my doc. I have had pneumonia as a child before.  <response>: HiT hanks for posting on ChatDoctorChronic cough and coughing up of dark fled is mostly like due to a lung infection. Persistence of symptoms on antibiotic may mean the germ in cause is not responding to the molecules. Most respiratory bacteria infections will however respond well on penicillin like amoxicillin and accolades like erythromycin. I will suggest you see a lung specialistNeurologist for evaluation given the fact that your condition is making your respiratory function worse. A chest X-ray and a sputum culture will be very important in your treatment. I will however advise you try the following:-Take enough fluids-Take a bucolic like carbocysteine 5-Take your inhalers regularly especially when obstructed.-Avoid irritants like cold, dust and Smokey lung specialist will take care of the rest. Hope my answer will help you Best regards 