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Related Experiment Videos

Further errors in polymorph identification: furosemide and finasteride.

Sohrab Karami1, Yang Li, David S Hughes

  • 1School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, England.

Acta Crystallographica. Section B, Structural Science
|July 15, 2006
PubMed
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Revisiting crystal structures of furosemide and finasteride revealed identical forms due to incomplete X-ray data. This study corrects previous polymorph misidentifications, clarifying the solid-state chemistry of these important drugs.

Area of Science:

  • Solid-state chemistry
  • Crystallography
  • Pharmaceutical science

Background:

  • Polymorphism is crucial for drug efficacy and formulation.
  • Accurate characterization of drug polymorphs is essential for regulatory approval.
  • Previous studies reported distinct polymorphs for furosemide and finasteride.

Purpose of the Study:

  • To re-evaluate the single-crystal X-ray diffraction data for furosemide and finasteride polymorphs.
  • To correct erroneous identification of distinct crystalline forms.
  • To clarify the true solid-state nature of furosemide and finasteride.

Main Methods:

  • Reanalysis of existing single-crystal X-ray diffraction datasets.
  • Comparison of crystallographic parameters and structural features.

Related Experiment Videos

  • Assessment of data completeness and quality.

    • Main Results:

    • Incomplete data collection led to the mistaken identification of two forms for both furosemide and finasteride.
    • Structural re-evaluation confirmed that the reported forms are, in fact, identical.
    • The single-crystal X-ray diffraction data was insufficient to distinguish between the alleged polymorphs.

    Conclusions:

    • The previously reported distinct polymorphs of furosemide and finasteride are identical.
    • Incomplete crystallographic data can lead to erroneous conclusions in solid-state characterization.
    • Accurate and complete data collection is paramount in identifying and differentiating drug polymorphs.