Doxolite Tablet is used to prevent and treat symptoms of asthma and chronic obstructive pulmonary disease (COPD). It contains Doxofylline, which relaxes the bronchial smooth muscle of the lung's airways, making it easier for asthma and COPD patients to breathe easily. It may cause side effects such as headaches, nausea, vomiting, stomach pain, irritability, insomnia (difficulty in falling or staying asleep) or a fast heart rate. 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