Definition of "theophylline" []

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

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "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."