Berodual N is used for the treatment of chronic obstructive pulmonary disease (COPD). COPD is a disease affecting the lungs which makes it harder for the person to breathe as the disease gets worse. Berodual N can also be used to help control symptoms in asthma. It contains 2 ingredients, fenoterol and ipratropium. Both ingredients work by relaxing the airway muscles, thus opening up the airways to make breathing easier.