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[Crystalline polymorphism of eflucimibe].

J P Ribet1, R Pena, A Chauvet

  • 1Institut de Recherche Pierre Fabre, 17, avenue Jean Moulin, F 81106 Castres, France.

Annales Pharmaceutiques Francaises
|June 7, 2002
PubMed
Summary
This summary is machine-generated.

Researchers identified two crystalline polymorphic forms (A and B) of the drug eflucimibe. Form A is the more thermodynamically stable form under typical conditions, crucial for drug formulation and bioavailability.

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Area of Science:

  • Pharmaceutical Chemistry
  • Solid-State Chemistry

Context:

  • Understanding drug bioavailability and formulation quality is critical in therapeutics.
  • Crystalline polymorphism significantly impacts drug properties and efficacy.

Purpose:

  • To investigate the crystalline polymorphism of eflucimibe during its research phase.
  • To characterize the different polymorphic forms using various analytical techniques.

Summary:

  • Two distinct polymorphic forms of eflucimibe, designated A and B, were identified and characterized using X-ray powder diffraction (XRPD), differential scanning calorimetry (DSC), infrared spectrometry (IR), and solid-state nuclear magnetic resonance (SSNMR).
  • Polymorph A exhibits specific thermal events related to conformational changes and phase transitions, while polymorph B shows distinct crystalline phase changes.
  • Form A demonstrates higher thermodynamic stability within the 25-50°C range and lower solubility in ethanol compared to Form B, with an A<-->B transition temperature below 25°C.

Impact:

  • This research provides foundational knowledge on eflucimibe's solid-state properties, essential for developing a stable and bioavailable drug product.
  • The identification of the most stable polymorph aids in optimizing drug formulation and manufacturing processes.
  • Understanding eflucimibe's polymorphism contributes to the successful development of this new chemical entity for therapeutic use.