Influence of a newly developed quinolone, T-3761, on pharmacokinetics of theophylline in rats

T. Hasegawa, M. Nadai, S. Haghgoo, K. I. Yamaki, K. Takagi, T. Nabeshima

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8 Citations (Scopus)


The effect of a new quinolone, T-3761, on the pharmacokinetics and metabolism of theophylline was investigated with rats. T-3761 at a high dose (20 mg/kg of body weight) was injected intravenously 10 min before an intravenous administration of theophylline (10 mg/kg). The presence of T- 3761 slightly delayed the disappearance of theophylline from plasma. Parameters related to the pharmacokinetic interaction between theophylline and T-3761 were estimated by noncompartmental methods. A significant decrease (approximately 25%) in the systemic clearance of theophylline was observed in the presence of T-3761. However, no significant changes between the control group and the T-3761-treated groups in the volume of distribution at a steady state were observed. Pretreatment with T-3761 increased the urinary excretion of unchanged theophylline (by approximately 25%) and decreased the nonrenal clearances (by approximately 30%), indicating that T-3761 inhibits the metabolism of theophylline. These findings suggest that T-3761 at the dose used in this study affects the pharmacokinetics and metabolism of theophylline.

Original languageEnglish
Pages (from-to)2138-2140
Number of pages3
JournalAntimicrobial agents and chemotherapy
Issue number9
Publication statusPublished - 1995
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Pharmacology
  • Pharmacology (medical)
  • Infectious Diseases


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