The asthalin Inhaler contains salbutamol, a bronchodilator medication used to treat asthma and other respiratory conditions. Salbutamol works by relaxing the muscles in the airways, making it easier to breathe. It is commonly used as a rescue inhaler during asthma attacks or to prevent exercise-induced bronchospasm. The inhaler delivers a metered dose of salbutamol directly into the lungs, providing quick relief of symptoms such as wheezing, coughing, and shortness of breath. It is important to follow the prescribed dosage instructions and to use the inhaler only as directed by a healthcare professional. Common side effects may include tremors, rapid heartbeat, and headache.