title: No effect of influenza vaccination on theophylline pharmacokinetics as studied by ultraviolet spectrophotometry, HPLC, and EMIT assay methods.
abstract: The effect of influenza vaccination on steady-state pharmacokinetics of theophylline was studied in six healthy young adults by comparing pharmacokinetic parameters found on days 4 and 5 during a 5-day course of theophylline alone with those obtained after influenza vaccination on day 4 of a second study phase. Theophylline plasma concentrations were measured by means of high-pressure liquid chromatography (HPLC) analysis and, in part, with a manual ultraviolet spectrophotometric method and with an EMIT assay. On the fourth and fifth days of each of the two periods of drug administration, theophylline plasma concentration-time curves were evaluated, and the following pharmacokinetic parameters were compared: trough plasma concentration (cmin), peak plasma concentration (cmax), time to peak (tmax), and the area under the curve during a dosing interval (AUC). None of these pharmacokinetic parameters of theophylline before and after vaccination were found to be significantly different with any of the analytical methods.
mesh_terms: D000328:Adult; D002851:Chromatography, High Pressure Liquid; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques; D007252:Influenza Vaccines; D008297:Male; D013056:Spectrophotometry, Ultraviolet; D013806:Theophylline / Q000493:pharmacokinetics*; D014611:Vaccination
chemical_list: D007252:Influenza Vaccines; D013806:Theophylline