Original Research Article | OPEN ACCESS

Assessment of the pharmaceutical quality of various brands of omeprazole capsules

Matthew I Arhewoh , Nkechi V Maduako, Millicent O Igwekpe, Augustine O Okhamafe

Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, University of Benin, PMB 1154, Benin City, 300001, Edo State, Nigeria.;

For correspondence:-  Matthew Arhewoh   Email:  arhewoh@uniben.edu   Tel:  +2348055306846

Published: 31 December 2023

Citation: Arhewoh MI, Maduako NV, Igwekpe MO, Okhamafe AO. Assessment of the pharmaceutical quality of various brands of omeprazole capsules. J Sci Pract Pharm 2023; 10(1):499-504 doi: 10.47227/jsppharm.v10i1.2

© 2023 The author(s).
This is an Open Access article that uses a funding model which does not charge readers or their institutions for access and distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0). This license requires that reusers give credit to the creator. It allows reusers to distribute, remix, adapt, and build upon the material in any medium or format, for noncommercial purposes only. .


Introduction: Omeprazole is a first-line therapy drug for the treatment of peptic ulcer disease. The availability of numerous generic brands in the market raises doubts about their quality.

Purpose: This study aimed to assess the pharmaceutical quality of various brands of omeprazole capsules marketed in three states of southern Nigeria.

Methods: Organoleptic and physicochemical properties of ten (10) generic brands of omeprazole capsules were assessed according to official and unofficial standards. Quality assurance tests such as weight uniformity, disintegration time and drug content assay were carried out. The dissolution test was done in a double dissolution medium consisting of 0.1 N HCl for 1.0 h and phosphate buffer pH 6.8 for 2.0 h.

Results: Capsules tested were suitably packaged with shells containing evenly coloured white pellets. All capsules were slightly soluble in water, sparingly soluble in ethanol and readily dissolved in alkaline medium. The 10 brands tested met the British Pharmacopeia (BP) specification for weight uniformity. All capsules had drug content within 90 - 110% and an average disintegration time of less than 15 min. All brands retained the drug in acid medium for 1 hour but released more than 75% within 40 min in phosphate buffer pH 6.8.

Conclusion: Brands of omeprazole capsules passed Pharmacopeia tests, exhibited similar in vitro drug release profiles and may therefore be used interchangeably for the treatment of peptic ulcer. The study also showed that almost all brands of omeprazole capsules available in Nigeria are imported, hence the need arises for regular post-clinical analysis of imported drugs.




Keywords: Omeprazole, generic brands, quality, analysis

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