Asthalin Inhaler is a fast-acting bronchodilator used to treat asthma, chronic obstructive pulmonary disease (COPD), and other breathing problems. It contains salbutamol, which relaxes the airway muscles and helps to open the air passages, making breathing easier. Asthalin is commonly known as a “rescue inhaler” since it gives immediate relief from sudden asthma episodes, wheezing, or shortness of breath. It is normally taken as needed, rather than as a long-term maintenance treatment. While it is quite helpful for immediate symptom relief, excessive use can cause negative effects such as rapid heartbeat, shakiness, and decreasing efficiency. As a result, it should only be used as directed by a healthcare provider.