title: Theophylline compounds in patients with reversible airways obstruction.
abstract: In a double blind cross-over comparison of a single dose 450-mg slow-release aminophylline (SRA) with placebo in eleven patients with stable, reversible airways obstruction SRA produced significantly greater increase in FEV1 and vital capacity from 2 to 9 hr after administration. A second double-blind cross-over comparison of 450-mg SRA with 400 mg of choline theophyllinate (CT) in eleven similar patients showed that SRA produced a slower rise in FEV1 and VC than CT. However, the increase in spirometric readings following SRA was sustained at 9 hr after administration where the spirometric recordings after CT were falling. Whereas CT produced a peak value in plasma theophylline at 1 hr, the highest values after SRA occurred at 4 or 8 hr after administration. The plasma theophylline level at 8 hr after SRA was significantly higher than that following CT. In this single-dose study, plasma theophylline levels obtained were within the normal therapeutic range and this was not exceeded and no side effects were recorded.
mesh_terms: D000328:Adult; D000368:Aged; D000402:Airway Obstruction / Q000188:drug therapy*; D000628:Aminophylline / Q000008:administration & dosage / Q000627:therapeutic use*; D002794:Choline / Q000031:analogs & derivatives* / Q000627:therapeutic use; D003692:Delayed-Action Preparations; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010919:Placebos; D012129:Respiratory Function Tests; D013806:Theophylline / Q000031:analogs & derivatives* / Q000627:therapeutic use
chemical_list: D003692:Delayed-Action Preparations; D010919:Placebos; D000628:Aminophylline; C012839:cholinophyllin; D013806:Theophylline; D002794:Choline