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Related Experiment Videos

Development of a dissolution medium for nimodipine tablets based on bioavailability evaluation.

Zhonggui He1, Dafang Zhong, Xiaoyan Chen

  • 1School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China. hezhgui@mail.sy.ln.cn

European Journal of Pharmaceutical Sciences : Official Journal of the European Federation for Pharmaceutical Sciences
|March 5, 2004
PubMed
Summary

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A new dissolution method for nimodipine tablets revealed significant bioavailability differences between brands. The study highlights the importance of appropriate dissolution media for accurate drug quality assessment.

Area of Science:

  • Pharmaceutical Sciences
  • Drug Dissolution and Bioavailability

Background:

  • Nimodipine is a critical medication, and ensuring consistent quality between different brands is essential for patient safety.
  • Existing dissolution methods may not adequately differentiate between nimodipine tablet formulations.

Purpose of the Study:

  • To evaluate the discriminatory potential of a novel dissolution medium for nimodipine tablets.
  • To compare the relative bioavailability of two commercial nimodipine tablet brands.

Main Methods:

  • A new dissolution medium (pH 4.5 acetate buffer with 0.05% sodium dodecyl sulfate) was developed and tested.
  • Dissolution profiles were compared against a standard medium (pH 4.5 acetate buffer with 0.3% sodium dodecyl sulfate).
  • Relative bioavailability was assessed in healthy volunteers using liquid chromatography-tandem mass spectrometry (LC-MS/MS).

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Main Results:

  • The newly developed dissolution medium showed a marked difference in dissolution rates between two nimodipine tablet brands.
  • Under the standard dissolution conditions, both brands met British Pharmacopoeia (BP) requirements with no significant difference.
  • Bioavailability studies revealed significant differences in pharmacokinetic parameters (AUC, Cmax) between the two brands.

Conclusions:

  • The proposed dissolution system is superior for discriminating between nimodipine tablet brands.
  • Significant differences in relative bioavailability exist between commercial nimodipine products, underscoring the need for robust quality control.