Theophyllinedrug info
theophylline 400 MG Extended Release Oral Tablet
What it is used for
Theophylline is indicated for the treatment of the symptoms and reversible airflow obstruction associated with chronic asthma and other chronic lung diseases, e.g., emphysema and chronic bronchitis.
Text above is quoted in full from the FDA-approved drug label published by openFDA, effective December 4, 2025. Matched to this product by RxNorm code. Cross-references to other sections of the full prescribing information have been removed, since they point to a document not shown here. Nothing else is changed: no sentence is shortened, reworded or summarised.
Description
Theophylline (Anhydrous) Extended-Release Tablets in a controlled-release system allows a 24-hour dosing interval for appropriate patients. Theophylline is structurally classified as a methylxanthine. It occurs as a white, odorless, crystalline powder with a bitter taste. Anhydrous theophylline has the chemical name 1H-Purine-2,6-dione,3,7-dihydro-1,3-dimethyl-, and is represented by the following structural formula: The molecular formula of anhydrous theophylline is C 7 H 8 N 4 O 2 with a molecular weight of 180.17. Each extended-release tablet for oral administration, contains 400 or 600 mg of anhydrous theophylline.
Inactive ingredients: glyceryl behenate, silicified microcrystalline cellulose, silicon dioxide, and magnesium stearate. Chemical Structure
Text above is quoted in full from the FDA-approved drug label published by openFDA, effective December 4, 2025. Matched to this product by RxNorm code. Cross-references to other sections of the full prescribing information have been removed, since they point to a document not shown here. Nothing else is changed: no sentence is shortened, reworded or summarised.
This page reproduces regulatory text for reference. It is not medical advice, and KenyRx is not a pharmacy or a prescriber. Talk to a doctor or pharmacist about whether a medicine is right for you.
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