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Related Experiment Videos

Bioavailability study of two different verapamil formulations.

C Horne1, G Stenzhorn, H Blume

  • 1Pharmakologisches Institut für Naturwissenschaftler, University, Frankfurt/M., FRG.

Archiv Der Pharmazie
|August 1, 1992
PubMed
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This study compared two oral verapamil 80 mg formulations. The dragée formulation showed significantly higher relative bioavailability than the film-coated tablet, indicating enhanced drug absorption.

Area of Science:

  • Pharmacology
  • Clinical Pharmacy
  • Drug Development

Background:

  • Verapamil is a widely used calcium channel blocker for cardiovascular conditions.
  • Assessing the relative bioavailability and bioequivalence of different oral formulations is crucial for therapeutic efficacy.
  • Understanding pharmacokinetic differences ensures consistent patient outcomes.

Purpose of the Study:

  • To determine the relative bioavailability and bioequivalence of an 80 mg verapamil dragée formulation compared to a film-coated tablet.
  • To evaluate pharmacokinetic parameters including AUC(o-oo), Cmax, and tmax for both verapamil and its active metabolite, norverapamil.
  • To establish whether the dragée formulation meets bioequivalence standards.

Main Methods:

  • A 2-period cross-over clinical study involving 16 healthy male volunteers.

Related Experiment Videos

  • Administration of 80 mg verapamil in both film-coated tablet (reference) and dragée (test) formulations.
  • Pharmacokinetic analysis using AUC(o-oo), Cmax, and tmax, with statistical evaluation via parametric and non-parametric tests.

    • Main Results:

    • The verapamil dragée formulation exhibited a mean relative bioavailability of 127% compared to the film-coated tablet.
    • Pharmacokinetic characteristics indicated higher drug exposure with the dragée formulation.
    • Statistical analysis of confidence intervals for AUC and Cmax was performed to assess bioequivalence.

    Conclusions:

    • The verapamil dragée formulation demonstrates significantly higher bioavailability than the reference film-coated tablet.
    • While bioavailability is higher, further assessment is needed to confirm bioequivalence based on established regulatory criteria.
    • These findings have implications for formulation selection and potential therapeutic adjustments in verapamil therapy.