Theophylline is used together with other medicines to treat the symptoms of asthma,
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Theophylline is used together with other medicines to treat the symptoms of asthma, bronchitis, emphysema, and other lung diseases. Theophylline belongs to a group of medicines known as bronchodilators. Bronchodilators are medicines that relax the muscles in the bronchial tubes (air passages) of the lungs.