Bro-Zedex LS Drops is used to provide relief from cough associated with bronchitis, bronchial asthma, chronic obstructive pulmonary disease (COPD), emphysema (damage of air sacs in the lungs) and other bronchopulmonary disorders where bronchospasm, mucous plugging and problems of expectoration co-exist. It contains Levosalbutamol, Ambroxol hydrochloride, and Guaiphenesin. Levosalbutamol works by relaxing muscles and widening the airways of the lungs. Ambroxol hydrochloride works by thinning and loosening phlegm (mucus) in the lungs, windpipe, and nose. Thereby helping to cough out phlegm easily. Guaiphenesin increases the volume of fluid in the airways, reduces the stickiness of mucus, and helps remove it from the airways. Together, Bro-Zedex LS Drops helps relieve the cough.