AB PHYLLINE CAPS is a medication that contains the active ingredient acebrophylline, which is a bronchodilator. It is used to treat conditions such as asthma and chronic obstructive pulmonary disease (COPD) by relaxing the muscles in the airways and making breathing easier. It helps to improve lung function and reduce symptoms such as wheezing, coughing, and shortness of breath. AB PHYLLINE CAPS should be taken as prescribed by a healthcare professional and may have some side effects such as nausea, vomiting, and headache.