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theophylline Definition

theo·phyl·line (t̸hē′ə fil′ēn′, -in)

noun

a colorless, crystalline alkaloid, CHNO·HO, extracted from tea leaves or prepared synthetically: an isomer of theobromine

Etymology: < ModL thea, tea (infl. by Gr, goddess, as being a divine herb, but < source of tea) + -phyll + -ine

theophylline Usage Examples

Converse of object

  • take: If you take theophylline for asthma, remind your doctor as he/she may want to monitor the level of theophylline in your blood.
  • find: Despite this, the levels of caffeine, theobromine and theophylline found in this survey are generally consistent with previous results.
  • receive: Therefore, where monitoring of plasma levels is not possible, the use of ciprofloxacin should be avoided in patients receiving theophylline.

Adjective modifier

  • e.g.: This is of potential clinical importance for products with a narrow therapeutic window, e.g. theophylline, clozapine and ropinirole.
  • oral: Three trials tested intravenous aminophylline and one oral theophylline, all added to standard treatments.

Modifies a noun

  • level: Elderly patients will tend therefore to have higher serum theophylline levels than younger adults at a given dose.
  • tablet: Or your doctor may suggest you take theophylline tablets.
  • clearance: Thus in patients with severe liver disease, theophylline clearance may be decreased.
  • concentration: When severe poisoning is suspected, the plasma theophylline concentration should be measured regularly, until concentrations are falling.

Noun used with modifier

  • plasma: Where this is not possible, patients should have their theophylline dose halved and plasma theophylline should be monitored closely.
  • serum: Elderly patients will tend therefore to have higher serum theophylline levels than younger adults at a given dose.