hi thank you for Providing the brief history of you As you been coughing from 2 months and the medicine prescribed is not working I will advice you to take a chest x-ray or a CT scan. Also taking a sputum culture should help understand what sort of infection it is and why the drug could not function. Also, kindly take steam inhalation or nebulizer by which the cough can be reduced, as the steam passing in and out of the lungs will help loosen the secretion as well. Perform regular breathing exercises as the lung is the main organ of the body which supplies fuel to the body. So Performing breathing exercises will help improve the overall body condition and all make the respiratory muscles stronger. In my clinical practice chronic cases are assessed thoroughly and then proper planning of the treatment helps them in 5-7 days of time. Regards Jay Indravadan Patel