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COURSE OVERVIEW BLOCK

What is your course about?

Who is the mini-course for?

SLIDE 1 — OPENING HOOK (45 sec)

SLIDE 2 — CONCEPT SIMPLIFIED (60 sec)

The equation (Q3C R9, Appendix 3)

The five factors

Common misconceptions to correct

SLIDE 4 — PRACTICAL APPLICATION (60 sec)

Worked example

Risk indicators (warning signs)

10-POINT AUDIT CHECKLIST (PDE Derivation)

Copy of 10-POINT AUDIT CHECKLIST (PDE Derivation)

Part A — Quiz (5 scenario-based questions)

Q1. A NOEL comes from a 13-week study in mice. What is the correct F1?

Q2. A PDE is being derived from a LOEL because no NOEL was established. What must you do?

Q3. Which body weight does Q3C(R9) use for the weight adjustment?

Q4. A 6-month rodent study with no severe toxicity and an established NOEL. What are F3, F4, F5?

Q5. Two valid studies exist. One gives a higher NOEL. The team picks it purely because the number is higher. What's the primary compliance problem?

SLIDE 5 — KNOWLEDGE CHECK + TAKEAWAYS (45 sec)

Part B — Reflection

Part C — Top 5 Takeaways

Welcome to "Calculating PDE from Toxicology Data Using ICH Q3C(R9) Factors," a comprehensive mini-course designed for pharmaceutical professionals. Permitted Daily Exposure (PDE) is a critical component in pharmaceutical manufacturing, ensuring that residual solvent limits are safe for human exposure.

Welcome to "Calculating PDE from Toxicology Data Using ICH Q3C(R9) Factors," a comprehensive mini-course designed for pharmaceutical professionals. Permitted Daily Exposure (PDE) is a critical component in pharmaceutical manufacturing, ensuring that residual solvent limits are safe for human exposure. However, translating animal toxicology data into safe human daily exposure thresholds can be complex and fraught with regulatory risks if done incorrectly. This course demystifies the ICH Q3C(R9) modifying-factor approach, providing you with the knowledge to confidently calculate, review, and defend PDE values. You will explore the fundamental equation, understand the strict application of the 50 kg human body weight assumption, and dive deep into the five modifying factors (F1 through F5). We will address common misconceptions, such as applying the wrong species factor or mishandling LOEL versus NOEL data, and replace flawed shortcuts with defensible scientific rationales. Through practical worked examples, risk indicator assessments, and a robust 10-point audit checklist, you will gain hands-on experience in deriving compliant PDEs. Whether you are reviewing calculations or defending solvent specifications during a regulatory audit, this course equips you with the essential skills to protect patient safety, ensure product quality, and maintain strict regulatory compliance.

130. Calculating PDE from Toxicology Data Using ICH Q3C(R9) Factors

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            <p>Establishing safe residual solvent limits is a critical regulatory requirement in pharmaceutical manufacturing, directly impacting patient safety and product quality. The Permitted Daily Exposure (PDE) serves as the foundational metric for these limits, necessitating a rigorous and scientifically defensible translation of animal toxicology data into safe human daily exposure thresholds. Utilizing the ICH Q3C(R9) modifying-factor approach, professionals can systematically derive these thresholds by applying specific uncertainty factors to established toxicological endpoints, such as the No Observed Effect Level (NOEL) or Lowest Observed Effect Level (LOEL). An incorrectly calculated PDE poses severe compliance risks, potentially compromising batch safety and product release. This underscores the necessity for a standardized, fully justified derivation process rather than relying on undocumented or convenient assumptions.</p>

<p>This comprehensive curriculum is designed specifically for Quality Assurance, Quality Control, Manufacturing, Validation, and Regulatory Affairs professionals who are tasked with reviewing, justifying, or defending residual solvent limits. Participants will explore the core components of the PDE equation, including the strict application of the 50 kg human body weight assumption and the specific purposes of modifying factors F1 through F5. By examining practical worked examples, identifying critical risk indicators in deficient toxicological risk assessments, and utilizing a standardized 10-point audit checklist, professionals will gain the competency to analyze basic toxicology summaries and make risk-based decisions. Ultimately, this training ensures that cross-functional teams can confidently establish Class 2 and Class 3 solvent limits, ensuring that every derived PDE withstands rigorous regulatory auditor scrutiny without requiring a formal background in toxicology.</p>
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