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(theophylline, anhydrous) Capsule, Extended Release
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 C7H8N4O2 with a molecular weight of 180.17.
Theo-24 (theophylline anhydrous capsule) ® is available as capsules intended for oral administration, containing 100 mg, 200 mg, 300 mg, or 400 mg of anhydrous theophylline per capsule, in an extended-release formulation which allows a 24-hour dosing interval for appropriate patients. Inactive ingredients are edible ink (which contains synthetic black iron oxide, FD&C Blue No. 1, FD&C Blue No. 2, FD&C Yellow No. 6, D&C Yellow No. 10, FD&C Red No. 40), ethylcellulose, gelatin, pharmaceutical glaze, colloidal silicon dioxide, starch, sucrose, talc, titanium dioxide, and coloring agents: 100 mg-includes FD&C Yellow No. 6; 200 mg-FD&C Red No. 3 and D&C Yellow No. 10; 300 mg-FD&C Blue No. 1 and FD&C Red No. 40; 400 mg-FD&C Red No. 40 and D&C Red No. 28.
Theo-24 (theophylline anhydrous capsule) ® Extended-release capsules meet Drug Release Test 6 as published in the current USP monograph for Theophylline Extended-release Capsules.
What are the possible side effects of theophylline?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Stop using theophylline and call your doctor at once if you have any of these serious side effects:
- seizure (convulsions);
- worsening of your condition, or symptoms of new illness;
- severe or ongoing nausea and vomiting, headache, fast or uneven heart rate, and trouble sleeping (insomnia);
- coughing up blood or vomit that looks like coffee grounds;
- ongoing fever;
- feeling restless,...
Last reviewed on RxList: 4/8/2009
This monograph has been modified to include the generic and brand name in many instances.
Additional Theo-24 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.
Allergies & Asthma
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