Asthalin Syrup is used to treat asthma and chronic obstructive pulmonary disease (COPD). It helps to relieve symptoms like coughing, wheezing and shortness of breath. It contains Salbutamol, which relaxes the muscles in the airways and increases airflow to the lungs. It may cause common side effects such as nausea, vomiting, restlessness, tremor (shakiness), headache, muscle tightness, dryness or soreness of the throat. Before taking this medicine, you should tell your doctor if you are allergic to any of its components or if you are pregnant/breastfeeding, and about all the medications you are taking and pre-existing medical conditions.