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(Generic versions may still be available.)
Slo-phyllin Side Effects Center
Medical Editor: John P. Cunha, DO, FACOEP
Slo-Phyllin (theophylline tablets) is a bronchodilator used for relief and/or prevention of symptoms of asthma and reversible bronchospasm associated with chronic bronchitis and emphysema. The brand name of this medication is discontinued, but generic versions may be available. Common side effects include nausea, vomiting, headache, insomnia, diarrhea, irritability, restlessness, muscle tremors, and increased urination.
The initial dose of Slo-Phyllin is 16 mg/kg/24 hours or 400 mg/24 hours (whichever is less) of anhydrous theophylline in divided doses at 6-or 8-hour intervals. Slo-Phyllin may interact with ephedrine, or other sympathomimetic bronchodilators. Tell your doctor all medications and supplements you use. During pregnancy, Slo-Phyllin should be used only if prescribed. This drug passes into breast milk and may cause irritability or other signs of mild toxicity in nursing infants. Consult your doctor before breastfeeding.
Our Slo-Phyllin (theophylline tablets) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What is Prescribing information?
The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.
Slo-phyllin FDA Prescribing Information: Side Effects
The following adverse reactions have been observed, but there has not been enough systematic collection of data to support an estimate of their frequency. The most consistent adverse reactions are usually due to overdosage.
Read the entire FDA prescribing information for Slo-phyllin (Theophylline, Anhydrous) »
Additional Slo-phyllin Information
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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