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Raman Mapping-Based Reverse Engineering Facilitates Development of Sustained-Release Nifedipine Tablet.

Ningyun Sun1,2, Liang Chang2, Yi Lu1,3

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Pharmaceutics
|May 28, 2022
PubMed
Summary

Reverse engineering using Raman mapping identified critical nifedipine particle attributes for generic drug development. This method successfully created bioequivalent generic sustained-release tablets, aiding generic drug formulation.

Keywords:
Raman mappingbioequivalenceparticle sizereverse engineeringsustained release

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Area of Science:

  • Pharmaceutical Sciences
  • Analytical Chemistry
  • Drug Delivery

Background:

  • Developing generic drugs requires understanding the reference listed drug's (RLD) critical attributes, which are often unknown.
  • Sustained-release formulations present unique challenges due to complex drug release mechanisms.

Purpose of the Study:

  • To investigate Raman mapping-based reverse engineering for identifying critical attributes of a reference nifedipine sustained-release tablet.
  • To assess the impact of nifedipine particle size and distribution on drug release and bioavailability.
  • To demonstrate the potential of this technique in developing bioequivalent generic formulations.

Main Methods:

  • Raman mapping was employed to analyze the spatial distribution and characteristics of nifedipine within a model sustained-release tablet.
  • Particle size and size distribution of nifedipine were determined using Raman mapping data.
  • In vitro release studies and pharmacokinetic studies in human volunteers were conducted to compare the generic formulation with the RLD.

Main Results:

  • Raman mapping revealed that nifedipine particle size and distribution are critical factors influencing the drug's release profile and bioavailability.
  • Tablets formulated with nifedipine particles of comparable size to the RLD (Adalat®-L) exhibited similar in vitro release patterns.
  • Pharmacokinetic studies confirmed the bioequivalence of the developed generic preparation to the reference listed drug.

Conclusions:

  • Raman mapping-based reverse engineering is a valuable tool for elucidating critical quality attributes of complex drug formulations.
  • This technique can significantly facilitate the development of bioequivalent generic sustained-release drug products.
  • Understanding particle attributes is crucial for achieving desired drug release and bioavailability in generic formulations.