Theophylline Clearance during and after Mild Upper Respiratory Infection

Abstract
Theophylline clearance was estimated by a single-sample technique in 19 subjects with acute clinical respiratory infections. Mean (.+-. SD) theophylline clearance during acute illness was 0.044 .+-. 0.011 L .cntdot. h-1 .cntdot. h-1 kg-1 compared to 0.043 .+-. 0.012 L .cntdot. h-1 .cntdot. kg-1 1 month later. In a subset of five subjects, single-sample clearance estimates were not different from standard multisample clearance estimates. Mild upper respiratory infection does not appear to alter theophylline clearance in adults.