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ISSN: 0975-0851

Journal of Bioequivalence & Bioavailability
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Research Article

Bioequivalence Study of 1,500 mg Glucosamine Sulfate in Thai Healthy Volunteers

Pravit Akarasereenont1*, Somruedee Chatsiricharoenkul2 and Piyapat Pongnarin2

1Department of Pharmacology, Faculty of Medicine Siriraj Hospital, Mahidol University, Thailand

2Department of Pharmacy, Faculty of Pharmacy, Mahidol University, Bangkok, Thailand

*Corresponding Author:
Pravit Akarasereenont
Department of Pharmacology
Faculty of Medicine Siriraj Hospital
Mahidol University, Prannok Rd
Bangkok 10700, Thailand
Tel: 66-2-4197569
Fax: 66-2-4181297
E-mail: [email protected]

Received Date: June 21, 2012; Accepted Date: August 16, 2012; Published Date: August 20, 2012

Citation:Akarasereenont P, Chatsiricharoenkul S, Pongnarin P (2012) Bioequivalence Study of 1,500 mg Glucosamine Sulfate in Thai Healthy Volunteers. J Bioequiv Availab 4: 091-095. doi: 10.4172/jbb.10000119

Copyright: © 2012 Akarasereenont P, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Glucosamine sulfate is widely used to relieve symptoms from osteoarthritis. This study was conducted in order to determine pharmacokinetic and assessed the in-vivo bioequivalence of two different hard capsule formulations of glucosamine sulfate when administered as equal dose of 1,500 mg. The two formulations contain different salt form where reference product is NaCl and test product is KCl. A randomized, single dose, two-treatment, two- period, two-sequence crossover study was conducted. Twenty-six healthy volunteers were recruited at Siriraj Clinical Research Unit. Each subject received a dose of 1,500 mg glucosamine sulfate of both formulations with at least a week washout period. Blood samples were collected over 24 hrs after the oral administration. The plasma fractions were analyzed for glucosamine using LC-MS/MS. Twenty-six volunteers enrolled in the present study. Pharmacokinetic parameters were determined using the non-compartment model. The 90% confidence intervals of the mean ratios (test/reference) of Cmax (111.19%; ranged from 93.01%-132.92%) and AUC0-t (107.24; ranged from 87.16%-131.93%) was not contained within the equivalence criteria of 80.00-125.00% (USFDA, 2003). However, this study showed the high intra-individual CV calculated from ANOVA for Cmax and AUC0-24 (≥ 30%). Thus, based on equivalence limits of USFDA (2003), the test product is not bioequivalent to the reference product in terms of rate and extent of absorption. However, concerning the wider equivalence criteria for highly variable drug (EMEA, 2008), the test product is bioequivalent to the reference formulation in terms of rate and extent of absorption.

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