午夜插插,噜噜噜影院,啪啪伊人网,欧美熟夫,景甜吻戏视频,男人强操性感蕾丝美女视频在线网站,日本美女跳舞视频

ChemicalBook >> journal list >> Journal of Veterinary Science >>article
Journal of Veterinary Science

Journal of Veterinary Science

IF: 1.5
Download PDF

Allometric analysis of tylosin tartrate pharmacokinetics in growing male turkeys.

Published:1 May 2020 DOI: 10.4142/jvs.2020.21.e35 PMID: 32476311
B?a?ej Po?niak, Marta Tikhomirov, Karolina Motykiewicz-Pers, Kamila Bobrek, Marcin ?wita?a

Abstract

Background: Despite common use of tylosin in turkeys, the pharmacokinetic (PK) data for this drug in turkeys is limited. Within a few months of growth, PK of drugs in turkeys undergoes changes that may decrease their efficacy due to variable internal exposure.

Objectives: The objective of this study was to investigate the influence of age on the PK of a single intravenous (i.v.) and oral administration of tylosin to turkeys at a dose of 10 and 50 mg/kg, respectively.

Methods: Plasma drug concentrations were measured using high-performance liquid chromatography with UV detection. The PK parameters were assessed by means of non-compartmental approach and were subjected to allometric analysis.

Results: During a 2.5-month-long period of growth from 1.4 to 14.7 kg, the median value for area under the concentration-time curve after i.v. administration increased from 2.61 to 7.15 mg × h/L and the body clearance decreased from a median of 3.81 to 1.42 L/h/kg. Over the same time, the median elimination half-life increased from 1.03 to 2.96 h. For the oral administration a similar trend was noted but the differences were less pronounced. Bioavailability was variable (5.76%-21.59%) and age-independent. For both routes, the plasma concentration of the major tylosin metabolite, tylosin D, was minimal. Protein binding was age-independent and did not exceed 50%. Allometric analysis indicated a relatively poor predictivity of clearance, volume of distribution and elimination half-life for tylosin in turkeys.

Conclusions: Age has a significant impact on tylosin PK in turkeys and dosage adjustment may be needed, particularly in young individuals.

Substances (4)

Related products
Procduct Name CAS Molecular Formula Supplier Price
Tylosin tartrate 74610-55-2 C46H77NO17.C4H6O6 412 suppliers $7.00-$861.00
Tylosin 1401-69-0 C46H77NO17 276 suppliers $6.00-$3935.00
Tylosin tartrate 1405-54-5 C46H77NO17 237 suppliers $49.65-$543.00
TYLOSIN D 4 suppliers Inquiry