Hello dear, Thank you for your contact to health care magic. I read and understand your concern. I am Dr Arun Tank answering your concern. I suggest you should do GeneXpert testing. This is the good test to detect TB and its resistant pattern. If the above test is negative you can declare it as negative TB. There are some other causes of cough even after the cured TB. This may be enlarged lymphnode, fibrous band etc. I advice you should do bronchoscopy once. This will give you guidance regarding the possible pathology. Curing this condition will automatically cures the cough. Till that time you can take the codeine phosphate. This is the cough suppressant. This should be taken under your doctors guidance as this is the habit forming drug. I will be happy to answer your further concern on bit.ly/DrArun. Thank you, Dr Arun Tank Infectious diseases specialist, HCM.