These could be signs of too much theophylline in your blood. Do not start or stop smoking without the approval of your doctor. Smoking changes the way your body uses theophylline, and you may need a dose adjustment. Do not take more of this medicine than is prescribed without consulting your doctor. Seek medical attention if you are having increasing difficulty breathing.
Theophylline is a bronchodilator.
Theophylline is used to treat the symptoms of asthma, bronchitis and emphysema. Theophylline may also be used for purposes other than those listed in this medication guide. This means that it is not known whether theophylline will harm an unborn baby. Do not take this medication without first talking to your doctor if you are pregnant. Theophylline passes into breast milk and may affect a nursing baby.