The Duolin Inhaler is a bronchodilator medication used to treat respiratory conditions such as asthma and chronic obstructive pulmonary disease (COPD). It contains two active ingredients: ipratropium bromide and salbutamol sulfate. Ipratropium works by relaxing the muscles around the airways, while salbutamol helps to widen the airways, making it easier to breathe. This combination provides rapid relief from symptoms such as wheezing, shortness of breath, and chest tightness. The Duolin Inhaler is typically used as a rescue inhaler for acute symptoms or as a maintenance therapy for long-term management of respiratory conditions. It is important to use the inhaler as directed by a healthcare professional for optimal effectiveness.