Duolin Inhaler is a combination of ipratropium bromide and levosalbutamol sulphate. It is commonly used for treating asthma, lung disorder, respiratory disease, nasal cavity blockage, inflammation of mucus and other related problems. It is suggested to give this inhaler to patients above 4 years of age. It can be given orally by nebulization, starting from two times to six times a day depending upon the condition of patients. All the necessary information related to Duolin Inhaler dosage, uses, side effects and composition are given on the packaging.