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 Critical Quality Characteristics of Drugs & Their Impact on Safety: What QPPV Should Know

The Qualified Person for Pharmacovigilance (QPPV) is pivotal in ensuring drug safety and regulatory compliance. Understanding the critical quality characteristics of drugs is essential for a QPPV to anticipate safety issues and manage risks effectively.

Key Quality Characteristics that Impact Drug Safety:

  1. Purity:

    • Importance: Impurities can cause adverse reactions or reduce drug efficacy.
    • QPPV's Role: Monitor post-market reports for any impurity-related safety signals and collaborate with quality teams on corrective actions if contamination is detected.
  2. Stability:

    • Importance: A drug’s stability affects its efficacy over time, especially when exposed to temperature changes or light.
    • QPPV's Role: Ensure that stability-related adverse reactions (e.g., due to temperature excursions during distribution) are reported and assessed in the pharmacovigilance system.
  3. Bioavailability:

    • Importance: Poor bioavailability can lead to sub-therapeutic effects, potentially causing treatment failure.
    • QPPV's Role: Track reports of inefficacy and assess if formulation issues related to bioavailability are contributing factors.
  4. Manufacturing Consistency:

    • Importance: Variations in manufacturing can affect the drug’s performance and safety profile.
    • QPPV's Role: Collaborate with manufacturing and quality teams to detect and address any adverse events arising from batch-to-batch inconsistencies.
  5. Excipients:

    • Importance: Inactive ingredients can influence how the drug is absorbed and tolerated.
    • QPPV's Role: Monitor for allergic reactions or intolerances linked to excipients, and flag any trends that could affect patient safety.
  6. Packaging and Delivery Systems:

    • Importance: Packaging affects drug protection, and delivery systems (e.g., inhalers, injectors) must function as intended for optimal safety.
    • QPPV's Role: Review reports related to packaging failures or malfunctions in delivery systems that could compromise drug quality or patient safety.

Why QPPV Needs to Understand These Characteristics:

  • Risk Assessment: Understanding these factors allows the QPPV to conduct more effective risk assessments and to anticipate potential safety issues.
  • Regulatory Compliance: The QPPV must ensure that any quality-related issues that impact safety are communicated to regulatory bodies, ensuring compliance with GVP.
  • Post-Market Surveillance: Continuous monitoring of how these characteristics influence real-world drug safety is critical for identifying and mitigating risks.

Key Takeaway: For a QPPV, knowledge of critical quality characteristics is vital to maintaining drug safety, ensuring proper pharmacovigilance, and addressing risks proactively.

#QPPV #Pharmacovigilance #DrugSafety #QualityControl #Manufacturing #RegulatoryAffairs #PatientSafety #Pharmaceuticals

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