AB Phylline SR 200 Tablet 10 s belongs to the class of drugs called bronchodilators primarily used to prevent and treat symptoms of asthma and chronic obstructive pulmonary disease COPD Asthma is a chronic long term respiratory condition in which airways narrow swell and produce extra mucus leading to difficulty in breathing COPD is a group of lung diseases with emphysema shortness of breath and chronic bronchitis inflammation of the lining of bronchial tubes AB Phylline SR 200 Tablet 10 s contains Acebrophylline that works by relaxing muscles and widening the airways of the lungs Additionally AB Phylline SR 200 Tablet 10 s also acts as mucolytic cough sputum thinner agent and helps in thinning and loosening phlegm mucus in lungs windpipe and nose Thereby it helps to cough out easily and makes breathing easier by opening airways