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Related Experiment Videos

Drug withdrawals and the lessons within.

Dennis A Smith1, Esther F Schmid

  • 1Pfizer Global Research and Development, Sandwich Laboratories, Sandwich, Kent, CT13 9NJ, UK. dennis.a.smith@pfizer.com

Current Opinion in Drug Discovery & Development
|February 1, 2006
PubMed
Summary

Drug withdrawals due to specific receptor interactions can be addressed by improved screening. Complex toxicity mechanisms remain challenging for drug discovery programs and risk assessment.

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Area of Science:

  • Pharmacology
  • Drug Discovery
  • Toxicology

Background:

  • Recent decades have seen significant drug withdrawals impacting pharmaceutical research and development.
  • Withdrawals often stem from drug interactions with biological targets (primary or secondary pharmacology).
  • Complex mechanisms like organ toxicity pose challenges for predictive screening and risk assessment.

Purpose of the Study:

  • To classify drugs withdrawn from the US market over the last 25 years based on their reasons for withdrawal.
  • To examine how drug discovery programs have evolved in response to these withdrawal events.
  • To analyze the impact of withdrawal reasons on the design of drug targets and screening programs.

Main Methods:

  • Classification of withdrawn drugs by their specific reasons for market withdrawal.
  • Analysis of the relationship between withdrawal mechanisms and drug discovery methodologies.
  • Review of changes in drug target identification and screening program design.

Main Results:

  • Drugs withdrawn due to simple, reversible interactions with single targets are identifiable through validated screening.
  • Complex mechanisms, such as organ toxicity, present difficulties in developing effective screening methods and extrapolating risks.
  • Drug discovery strategies have been modified to better predict and mitigate withdrawal-related issues.

Conclusions:

  • Understanding the specific pharmacology leading to drug withdrawal is crucial for improving preclinical screening.
  • Addressing complex toxicological mechanisms requires innovative approaches in drug discovery and risk assessment.
  • The analysis of past withdrawals informs the future design of safer and more effective drug development programs.

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