Theophylline is a bronchodilator. It works by relaxing muscles in the lungs and chest, making the lungs less sensitive to allergens and other causes of bronchospasm.

Theophylline is used to treat symptoms such as wheezing or shortness of breath caused by asthma, bronchitis, emphysema, and other breathing problems

Theophylline may also be used for purposes not listed in this medication guide.

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  • Elixophyllin, Theo-24
  • Chest pain or discomfort
    dizziness
    fainting
    fast, slow, or irregular heartbeat
    increase in urine volume
    lightheadedness
    persistent vomiting
    pounding or rapid pulse
    seizures
    shakiness
  • Patients who metabolize theophylline at a normal or slow rate are reasonable candidates for once-daily dosing with Theo-24. Patients who metabolize theophylline rapidly (e.g., the young, smokers, and some nonsmoking adults) and who have symptoms repeatedly at the end of a dosing interval, will require either increased doses given once a day or preferably, are likely to be better controlled by a schedule of twice-daily dosing. Those patients who require increased daily doses are more likely to experience relatively wide peak-trough differences and may be candidates for twice-a-day dosing with Theo-24. Patients should be instructed to take this medication each morning at approximately the same time and not to exceed the prescribed dose. Recent studies suggest that dosing of extended-release theophylline products at night (after the evening meal) results in serum concentrations of theophylline which are not identical to those recorded during waking hours and may be characterized by early trough and delayed peak levels. This appears to occur whether the drug is given as an immediate-release, extended-release, or intravenous product. To avoid this phenomenon when two doses per day are prescribed, it is recommended that the second dose be given 10 to 12 hours after the morning dose and before the evening meal