Serobid CFC Free Inhaler is an anti asthma medicine that contains Salmeterol as an active ingredient It is used to treat asthma overproduction production of mucus and chronic obstructive pulmonary disease blockage of airways in the lungs It helps to relieve symptoms such as wheezing shortness of breath chest tightness breathing difficulties coughing etc Your doctor may prescribe this medicine alone or in combination with other medicines based on the severity of your condition Serobid CFC Free Inhaler relaxes the airway muscles and open the airways thus improves the airflow and makes it easier to breathe