Pharmacokinetic studies of theophylline in cats

Abstract
The pharmacokinetics of theophylline [a bronchodilator] were determined in adult cats and the data were fitted to a 2-compartment model. Single i.v. and multiple oral doses of aminophylline were used. The mean plasma theophylline half-life (t1/2) following the single i.v. dose was 7.8 h and the mean apparent specific volume of distribution (V''d(area)) was 0.46 1/kg. The absorption half-life (t1/2ab) was 0.5 h and the bioavailability was 96% following oral administration. There was excellent agreement between the predicted and observed plasma theophylline concentrations following multiple oral doses.

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