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Influence of albendazole on the disposition kinetics and milk antimicrobial equivalent activity of enrofloxacin in lactating goats.

Abstract：

:The pharmacokinetics of single intravenous and intramuscular administrations and milk antimicrobial equivalent activity of enrofloxacin at a dose of 5 mg per kilogram body weight were studied in clinically healthy lactating goats which were either not treated or had received 7.5 mg per kilogram body weight of albendazole orally. The concentrations of enrofloxacin in serum and milk were determined using microbiological assay. Following intravenous injection, enrofloxacin antimicrobial equivalent activity versus time data in serum was described by a two-compartmental open model. Albendazole treatment significantly decreased the elimination half-life (t(1/2beta)) (P>or=0.05) and the mean residence time (MRT) (P>or=0.05), whereas, the rate of enrofloxacin return to central compartment from peripheral tissue (K(21)) was significantly increased (P>or=0.01). In contrast, the volumes of distribution V(d(area)) and V(d(SS)) were significantly decreased (P>or=0.01 and P>or=0.05, respectively) in albendazole-treated goats. After intramuscular injection, enrofloxacin was rapidly absorbed in control and albendazole-treated lactating goats with absorption half-lives (t(1/2ab)) 0.43 and 0.39 h, respectively. The mean peaks of serum concentration (C(max)) were 0.68 and 0.65 mcg ml(-1) attained at (t(max)) 1.08 and 1.12 h, before and after albendazole dosing, respectively. The elimination half-life (t(1/2el)) and (MRT) following intramuscular injections were also shorter in the albendazole-treated lactating goats. The systemic bioavailability of enrofloxacin was significantly decreased from 110.16 to 84.38% in albendazole-treated lactating goats. Concomitant administration of albendazole with enrofloxacin resulted in significant alterations in the disposition kinetic of enrofloxacin and significant decrease in enrofloxacin concentrations in milk. Consequently, the interaction between albendazole and enrofloxacin could be of clinical significance and may require monitoring and adjustment of enrofloxacin dosage.

journal_name

Pharmacol Res

journal_title

Pharmacological research

authors

Abo El Sooud K

doi

10.1016/s1043-6618(03)00179-8

keywords:

subject

Has Abstract

pub_date

2003-10-01 00:00:00

pages

389-95

issue

eissn

1043-6618

issn

1096-1186

pii

S1043661803001798

journal_volume

pub_type

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Influence of albendazole on the disposition kinetics and milk antimicrobial equivalent activity of enrofloxacin in lactating goats.