Abstract
The effects of 4-hydroxyantipyrine (4-OH), a major metabolite of antipyrine, and its 4-O-sulfate (4-S) on the pharmacokinetics of antipyrine were investigated in rats. Plasma elimination of intravenously administered antipyrine was significantly decelerated under a steady-state concentration of 4-OH but not under that of 4-S. Tissue-to-plasma concentration ratio (Kp) of antipyrine under its steady-state concentration was significantly increased in the brain and heart by the concomitant use of 4-OH, while similar use of 4-S had no effect. The enhancement of the blood-brain barrier (BBB) permeability of antipyrine caused by the concomitant use of 4-OH was believed to be concerned with the increase of the Kp value of antipyrine in the brain. These results suggested that 4-OH could be used as a biodistribution promoter.
Original language | English |
---|---|
Pages (from-to) | 529-534 |
Number of pages | 6 |
Journal | Biological and Pharmaceutical Bulletin |
Volume | 24 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2001 |
Keywords
- 4-hydroxyantipyrine
- 4-hydroxyantipyrine O-sulfate
- Antipyrine
- Biodistribution promoter
- Concomitant use
- Drug/metabolite interaction
ASJC Scopus subject areas
- Pharmacology
- Pharmaceutical Science