COMPARATIVE IN-VITRO BIOEQUIVALENCE STUDIES OF SOME BRANDS OF METRONIDAZOLE TABLET MARKETED IN ZARIA, KADUNA STATE
COMPARATIVE IN-VITRO BIOEQUIVALENCE STUDIES OF SOME BRANDS OF METRONIDAZOLE TABLET MARKETED IN ZARIA, KADUNA STATE
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Date
2019-12
Authors
MALUMFASHI, Mujitapha Fatima
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Abstract
Metronidazole is an antibacterial and antiprotozoal drug used in the treatment of amebiasis,
giardiasis, trichomoniasis and other microbial diseases. It is an essential drug commonly found in
Nigerian market and has so many generics and dosage forms under various trade names by
different manufacturers. The purpose of the study was to evaluate and compare the in-vitro
bioequivalence of branded and generic metronidazole tablet in three different physiological media
(pH 1.2, 4.5 and 6.8). Six brands of metronidazole tablet were randomly selected from different
areas of Zaria town and evaluated for quality via identification test, assay, weight variation test,
disintegration time test, friability, crushing strength and dissolution. Three UV
spectrophotometric methods were developed, validated and used for determining the amount of
metronidazole release during the in-vitro dissolution studies. The percentage of metronidazole
released was then subjected to in-vitro bioequivalence comparison using the model independent
method of comparism. The results showed that all brands passed identification an assay test except
brand MD and ME that failed the assay test. The tested brands passed weight variation test,
disintegration time test, friability and hardness except brand ME which failed the hardness test.
Wavelength of maximum absorbance (ʎmax) of 295nm, 345nm and 350nm were recorded for
metronidazole in pH media 1.2, 4.5 and 6.8 respectively, with a linear relation at concentration
range of 2-64𝜇g/mL. The correlation coefficients were close to unity with percentage
recoveries ranging from 98-102% and precision (% CV) <15%. The in-vitro dissolution
profile studies showed that brand MB and MC are similar with brand MA at difference
factor (f1) ≤15 and similarity factor (f2) >50; therefore, can be used interchangeable with brand
MA in all the three simulated physiological media. Also, brand MF had similar dissolution profile
with MA in two physiological media (pH 1.2 and 4.5) but not in pH 6.8. However, the dissolution
profile of brand MD and brand ME were not similar with brand MA in all the three media. The
percentage dissolution efficiency (DE) of all the brands in all the three media were within the
acceptable limit of ±10%. It was concluded that the branded MA could be interchanged with
brand MB and brand MC in all the three media and with brand MF in pH 1.2 and pH 4.5 but not
in pH 6.8 and also not with brand MD and brand ME in all the three media.
Description
A THESIS SUBMITTED TO THE SCHOOL OF POSTGRADUATE STUDIES,
AHMADU BELLO UNIVERSITY, ZARIA IN PARTIAL FULFILLMENT OF THE
REQUIREMENTS FOR THE AWARD OF MASTER OF SCIENCE DEGREE IN
PHARMACEUTICAL CHEMISTRY
DEPARTMENT OF PHARMACEUTICAL AND MEDICINAL CHEMISTRY,
FACULTY OF PHARMACEUTICAL SCIENCES,
AHMADU BELLO UNIVERSITY,
ZARIA
Keywords
COMPARATIVE IN-VITRO BIOEQUIVALENCE STUDIES,, BRANDS,, METRONIDAZOLE TABLET MARKETED,, ZARIA,, KADUNA STATE.