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Titolo:
Faecal excretion profile of moxidectin and ivermectin after oral administration in horses
Autore:
Perez, R; Cabezas, I; Sutra, JF; Galtier, P; Alvinerie, M;
Indirizzi:
Concepcion Univ, Farmacol Lab, Fac Med Vet, Chillan, Chile Concepcion Univ Chillan Chile Farmacol Lab, Fac Med Vet, Chillan, Chile INRA, Lab Pharmacol, F-31931 Toulouse, France INRA Toulouse France F-31931 RA, Lab Pharmacol, F-31931 Toulouse, France
Titolo Testata:
VETERINARY JOURNAL
fascicolo: 1, volume: 161, anno: 2001,
pagine: 85 - 92
SICI:
1090-0233(200101)161:1<85:FEPOMA>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
INJECTABLE FORMULATIONS; TISSUE DISTRIBUTION; CYATHOSTOME LARVAE; SUSTAINED-RELEASE; CATTLE; PLASMA; PHARMACOKINETICS; FECES; AVERMECTINS; ABSORPTION;
Keywords:
endectocides; ivermectin; moxidectin; faeces; excretion; anthelmintics; horses;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Perez, R Concepcion Univ, Farmacol Lab, Fac Med Vet, POB 537, Chillan, Chile Concepcion Univ POB 537 Chillan Chile , POB 537, Chillan, Chile
Citazione:
R. Perez et al., "Faecal excretion profile of moxidectin and ivermectin after oral administration in horses", VET J, 161(1), 2001, pp. 85-92

Abstract

A study was undertaken to evaluate and compare faecal excretion of moxidectin and ivermectin in horses after oral administration of commercially available preparations. Ten clinically healthy adult horses, weighing 390-446 kg body weight (b.w.),were allocated to two experimental groups. Group I wastreated with an oral gel formulation of moxidectin at the manufacturer's recommended therapeutic dose of 0.4 mg/kg b.w. Group II was treated with an oral paste formulation of ivermectin at the recommended dose of 0.2 mg/kg b.w. Faecal samples were collected at different rimes between 1 and 75 days post-treatment. After faecal drug extraction and derivatization, samples were analysed by High Performance Liquid Chromatography using fluorescence detection and computerized kinetic analysis. For both drugs the maximum concentration level was reached at 2.5 days post administration. The ivermectin treatment groups' faecal concentrations remained above the detectable level for 40 days (0.6 +/- 0.3 ng/g), whereas the moxidectin treatment group remained above the detectable level for 75 days (4.3 +/- 2.8 ng/g). Ivermectin presented a faster elimination rate than moxidectin, reaching 90% of the total drug excreted in faeces at four days post-treatment, whereas moxidectin reached similar levels at eight days post treatment. No significant differences were observed for the values of maximum faecal concentration (Cm,) and time of C-max (T-max) between both groups of horses, demonstrating similar patterns of drug transference from plasma to the gastrointestinal tract. The values of the area under the faecal concentration time curve were slightly higher in the moxidectin treatment group (7104 +/- 2277 ng.day/g) but were not significantly different from those obtained in the ivermectin treatment group (5642 +/- 1122 ng.day/g). The results demonstrate that although a 100% higher dose level of moxidectin was used, attaining higher plasma concentration levels and more prolonged excretion and gut secretion than ivermectin, the concentration in faeces only represented 44.3 +/- 18.0% of the total parental drug administered comparedto 74.3 +/- 20.2% for ivermectin. This suggests a higher level of metabolization for moxidectin in the horse. (C) 2001 Harcourt Publishers Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/01/20 alle ore 01:16:16