theophylline: meaning, definition, pronunciation and examples
Low-frequencyTechnical/Medical
Quick answer
What does “theophylline” mean?
A bitter alkaloid, similar to caffeine, used as a bronchodilator in the treatment of asthma and other respiratory conditions.
Audio
Pronunciation
Definition
Meaning and Definition
A bitter alkaloid, similar to caffeine, used as a bronchodilator in the treatment of asthma and other respiratory conditions.
A methylxanthine drug that relaxes smooth muscle in the bronchial passages and pulmonary blood vessels, and is also used in the management of certain heart and lung diseases.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage between UK and US medical English. Spelling and pronunciation are standardised.
Connotations
Strictly medical/pharmacological; neutral clinical term in both regions.
Frequency
Equally low-frequency outside medical contexts in both varieties.
Grammar
How to Use “theophylline” in a Sentence
N/A - Primarily a noun. As a drug name, it typically follows verbs like administer, prescribe, monitor, or is preceded by adjectives like high, low, therapeutic.Vocabulary
Collocations
Examples
Examples of “theophylline” in a Sentence
verb
British English
- N/A
American English
- N/A
adverb
British English
- N/A
American English
- N/A
adjective
British English
- The theophylline infusion rate must be carefully titrated.
- She presented with classic theophylline toxicity symptoms.
American English
- The theophylline dosage was adjusted based on plasma levels.
- He experienced a theophylline-induced arrhythmia.
Usage
Meaning in Context
Business
Rare, except in pharmaceutical manufacturing or healthcare business reports.
Academic
Common in medical, pharmacological, and biochemical research papers and textbooks.
Everyday
Virtually never used in everyday conversation; only by patients prescribed the drug or healthcare professionals.
Technical
Core term in clinical medicine, pulmonology, pharmacology, and toxicology.
Vocabulary
Synonyms of “theophylline”
Strong
Weak
Vocabulary
Antonyms of “theophylline”
Watch out
Common Mistakes When Using “theophylline”
- Misspelling as 'theophyline' (missing an 'l').
- Confusing it with 'theobromine' (a related compound found in chocolate).
- Using it as a general term for asthma inhalers.
FAQ
Frequently Asked Questions
Its use has declined in favour of inhaled corticosteroids and beta-agonists due to its side-effect profile and need for monitoring, but it remains an option for severe or refractory cases.
It occurs naturally in small quantities in tea leaves (Camellia sinensis) and cocoa beans.
It has a narrow therapeutic window; levels slightly above the therapeutic range can cause serious toxicity (nausea, seizures, cardiac arrhythmias), while levels below are ineffective.
Caution is advised. Caffeine and other methylxanthines in these beverages can add to the stimulant side effects (nervousness, tachycardia) of theophylline, though the interaction is not typically dangerous at moderate consumption.
A bitter alkaloid, similar to caffeine, used as a bronchodilator in the treatment of asthma and other respiratory conditions.
Theophylline is usually technical/medical in register.
Theophylline: in British English it is pronounced /ˌθiːəʊˈfɪl.iːn/, and in American English it is pronounced /ˌθiːəˈfɪlɪn/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “N/A”
Learning
Memory Aids
Mnemonic
Think: THEO (like 'theory' of breathing) + PHYLL (like 'leaf', from the tea plant) + INE (a common ending for drugs/chemicals). It's a drug from tea-related compounds for opening airways.
Conceptual Metaphor
THEOPHYLLINE IS A KEY (that unlocks constricted airways).
Practice
Quiz
Theophylline is primarily classified as which type of agent?