from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A colorless crystalline alkaloid, C7H8N4O2, derived from tea leaves or made synthetically, used in medicine especially as a bronchial dilator.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Methylxanthine drug used in therapy for respiratory diseases such as COPD or asthma.

from The Century Dictionary and Cyclopedia

  • n. A colorless alkaloid, contained in tea-leaves and prepared synthetically from 1-methylxanthin. It crystallizes in thin monoclinic plates or in needles, melts at 264° C, and acts on the muscles. Also called 1,3-dimethylxanthin or 1,3-dimethyl-2,6-dioxypurin.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a colorless crystalline alkaloid derived from tea leaves or made synthetically; used in medicine as a bronchial dilator


from The American Heritage® Dictionary of the English Language, 4th Edition

theo(bromine) + phyll(o)- + -ine2.


  • This results in theophylline back diffusing across the gut lumen to be absorbed onto the charcoal.


  • Patients on long-term theophylline therapy may experience adverse reactions from the drug at lower serum concentrations when compared to similar reactions experienced by patients suffering from acute ingestions. 1 Theophylline affects several different organ systems and, therefore, individuals suffering from intoxication of this drug may present with a wide range of symptoms.


  • Some of the most commonly used bronchodilators taken in liquid or capsule form (example, the caffeine-related compound called theophylline), as an inhaled powder (example, Intal, which contains sodium cromoglicate - known as a mast cell stabilizer), and orally or by injection (example, steroids) must not be used without the approval of a doctor.

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  • A chemical relative of caffeine called theophylline is found in tea and is in some respects more potent than caffeine, but tea contains only trace amounts.

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  • It also contains a mild stimulant called theophylline that doesn’t sound very natural to me, it sure sounds like it could do a number on my brain.

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  • Repetitive oral activated charcoal and control of emesis in severe theophylline toxicity.


  • Nausea, vomiting and hematemesis are quite common and may occur in patients with only mild theophylline toxicity.


  • These patients include the elderly, patients with liver diseaseor congestive heart failureand those individuals with extremely high serum theophylline levels.


  • Life-threatening theophylline toxicity is not predictable by serum levels.


  • Serum levels are effectively lowered even following intravenous administration of theophylline because activated charcoal sets up a concentration gradient across the gut lumen.



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