** Thanks for contacting with your health concern 1. As the symptom [coughing] is there for the last one month, and there is no relief with conventional line of treatment thus following should be your approach: i. Ask for investigations like . Hb%, WBC for eosinophilia . X-ray chest for TB, Pneumonia . If other investigations are normal, HIV test [as routine] PS. As cough is there for 15 days, no response to antibiotic thus this is an indication for immediate X-ray. ii. The choice of antibiotic will vary from doctor to doctor, and from locality to locality iii. sudden unconsciousness after a bout of cough could be normal: cough syncope [which typically happens], but at least cardiac tests should be done to exclude any heart disease.