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Related Experiment Videos

Dissolution of omeprazole from delayed-release solid oral dosage forms.

A Farinha1, A Bica, J M Martins

  • 1Laboratório de Estudos Farmacêuticoş, Lisboa, Portugal.

Drug Development and Industrial Pharmacy
|June 29, 2000
PubMed
Summary

The dissolution testing for omeprazole enteric-coated products needs adjustment. A pH 8.0 dissolution medium effectively differentiates products, unlike the USP 23 method which causes omeprazole degradation.

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Area of Science:

  • Pharmaceutical Sciences
  • Drug Delivery and Formulation

Background:

  • Official pharmacopoeias lack specific dissolution testing for omeprazole enteric-coated products.
  • The United States Pharmacopeia (USP) 23 provides a general monograph for enteric-coated dosage forms.

Purpose of the Study:

  • To evaluate the impact of medium pH on the dissolution rates of omeprazole from various enteric-coated products.
  • To assess the suitability of the USP 23 dissolution procedure for omeprazole formulations.

Main Methods:

  • Dissolution testing of four different omeprazole enteric-coated products.
  • Investigation of dissolution rates in media with varying pH levels (7.4 and 8.0).
  • Analysis of omeprazole degradation under USP 23 recommended conditions.

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Main Results:

  • The USP 23 dissolution procedure is unsuitable due to omeprazole degradation.
  • A dissolution medium with pH 8.0 demonstrated significantly different dissolution rates compared to pH 7.4.
  • The pH 8.0 medium allowed for effective discrimination between omeprazole products from different manufacturers.

Conclusions:

  • The current USP 23 general monograph for enteric-coated products is inadequate for omeprazole.
  • Optimized dissolution media (e.g., pH 8.0) are necessary for accurate biopharmaceutical quality assessment of omeprazole.
  • The findings enable better differentiation of omeprazole product quality based on dissolution profiles.