title: Influence of Sanguisorba officinalis, a mineral-rich plant drug, on the pharmacokinetics of ciprofloxacin in the rat.
abstract: The significance of an interaction between ciprofloxacin and Sanguisorba officinalis L. (SO), a mineral-rich herbal medicine, was evaluated in this study. Male Sprague-Dawley rats (220-250 g) receiving ciprofloxacin dosages of 20 mg/kg po were concomitantly dosed with an aqueous extract of SO (equivalent to 2 g/kg crude drug). Blood and urine samples were collected over 6 and 24 h, respectively, for the quantitation of ciprofloxacin by HPLC. The presence of SO reduced significantly (P < 0.05) the maximum plasma concentration, the area under the concentration-time curve and the urinary recovery of ciprofloxacin, by 94%, 78% and 79%, respectively, compared with rats receiving only ciprofloxacin. The presence of SO also caused an eight-fold and two-fold increase in drug distribution (Vd, lambda(z)/F) and terminal elimination half-life (t1/2, lambda(z)) from 30.8 L/kg and 1.96 h, respectively. Therefore, should the use of both agents be required, sufficient time should be allowed to ensure the efficacy of ciprofloxacin.
authors.affiliation: Department of Pharmacy, The Chinese University of Hong Kong, Shatin, NT.
authors.forename: M
authors.initials: M
authors.lastname: Zhu
authors.forename: P Y
authors.initials: PY
authors.lastname: Wong
authors.forename: R C
authors.initials: RC
authors.lastname: Li
mesh_terms: D000818:Animals; D000890:Anti-Infective Agents / Q000008:administration & dosage / Q000493:pharmacokinetics*; D002412:Cations / Q000032:analysis; D002939:Ciprofloxacin / Q000008:administration & dosage / Q000493:pharmacokinetics*; D004347:Drug Interactions; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000494:pharmacology*; D008297:Male; D008670:Metals / Q000032:analysis; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D000890:Anti-Infective Agents; D002412:Cations; D004365:Drugs, Chinese Herbal; D008670:Metals; D002939:Ciprofloxacin