Euphylong is used to relieve the symptoms of asthma and other respiratory diseases characterized by airway obstruction, such as bronchitis and emphysema. Euphylong is used to relieve the symptoms of asthma and other respiratory diseases characterized by airway obstruction, such as bronchitis and emphysema. It is a drug that falls under the class of matelexanates. Euphylong works by relaxing the muscles surrounding the bronchi, which leads to their expansion. Euphylong enhances the resistance of the airways to substances that cause contraction, making it easier for patients to breathe.