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Moczarnik J, Berger DJ, Noxon JO, LeVine DN, Lin Z, Coetzee JF, Mochel JP. Relative Oral Bioavailability of Two Amoxicillin-Clavulanic Acid Formulations in Healthy Dogs: A Pilot Study. J Am Anim Hosp Assoc 2018; 55:14-22. [PMID: 30427713 DOI: 10.5326/jaaha-ms-6872] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The use of human generic amoxicillin-clavulanic acid formulations in veterinary medicine is currently lacking supportive evidence. This pilot study was conducted to determine preliminary pharmacokinetic parameters and relative oral bioavailability of a human generic and veterinary proprietary 4:1 amoxicillin-clavulanic acid formulation in healthy dogs to evaluate whether drug exposure was similar and to determine if further comparative investigation is warranted. Each dog received a single oral dose of each formulation containing 500:125 mg of amoxicillin-clavulanic acid at two separate instances with a 2 wk washout period between product administration. Following drug administration, blood was collected at fixed times over 24 hr to measure plasma amoxicillin and clavulanic acid concentrations using liquid chromatography-mass spectrometry. There were no statistically significant differences between pharmacokinetic parameters of either formulation. Clavulanic acid showed greater between-dog variation in drug exposure between formulations compared with amoxicillin and was also observed to be more variable within the veterinary proprietary formulation. The average relative oral bioavailability was 98.2% (23.6% coefficient of variation) for amoxicillin and 152.6% (64.3% coefficient of variation) for clavulanic acid between formulations. This pilot investigation supports the need for further bioequivalence studies regarding these formulations before commenting on product interchangeability.
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Affiliation(s)
- Jennifer Moczarnik
- From the Lloyd Veterinary Medical Center (J.M.), Department of Veterinary Clinical Sciences (D.J.B., J.O.N., D.N.L.), and Department of Biomedical Sciences (J.P.M.), College of Veterinary Medicine, Iowa State University, Ames, Iowa; and Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas (Z.L., J.F.C.)
| | - Darren J Berger
- From the Lloyd Veterinary Medical Center (J.M.), Department of Veterinary Clinical Sciences (D.J.B., J.O.N., D.N.L.), and Department of Biomedical Sciences (J.P.M.), College of Veterinary Medicine, Iowa State University, Ames, Iowa; and Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas (Z.L., J.F.C.)
| | - James O Noxon
- From the Lloyd Veterinary Medical Center (J.M.), Department of Veterinary Clinical Sciences (D.J.B., J.O.N., D.N.L.), and Department of Biomedical Sciences (J.P.M.), College of Veterinary Medicine, Iowa State University, Ames, Iowa; and Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas (Z.L., J.F.C.)
| | - Dana N LeVine
- From the Lloyd Veterinary Medical Center (J.M.), Department of Veterinary Clinical Sciences (D.J.B., J.O.N., D.N.L.), and Department of Biomedical Sciences (J.P.M.), College of Veterinary Medicine, Iowa State University, Ames, Iowa; and Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas (Z.L., J.F.C.)
| | - Zhoumeng Lin
- From the Lloyd Veterinary Medical Center (J.M.), Department of Veterinary Clinical Sciences (D.J.B., J.O.N., D.N.L.), and Department of Biomedical Sciences (J.P.M.), College of Veterinary Medicine, Iowa State University, Ames, Iowa; and Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas (Z.L., J.F.C.)
| | - Johann F Coetzee
- From the Lloyd Veterinary Medical Center (J.M.), Department of Veterinary Clinical Sciences (D.J.B., J.O.N., D.N.L.), and Department of Biomedical Sciences (J.P.M.), College of Veterinary Medicine, Iowa State University, Ames, Iowa; and Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas (Z.L., J.F.C.)
| | - Jonathan P Mochel
- From the Lloyd Veterinary Medical Center (J.M.), Department of Veterinary Clinical Sciences (D.J.B., J.O.N., D.N.L.), and Department of Biomedical Sciences (J.P.M.), College of Veterinary Medicine, Iowa State University, Ames, Iowa; and Department of Anatomy and Physiology, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas (Z.L., J.F.C.)
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