European Pharmacopoeia Activities on Nitrosamines and other Mutagenic Impurities
- Ph. Eur. General policy on DNA reactive impurities
- Control of Nitrosamines in Ph. Eur.
- Changes in individual and general monographs following the Sartan case
- New general chapter on control of nitrosamines
Root Causes for Nitrosamine Impurities and other Mutagenic Impurities – Practical Approaches to Assess the Risks
- Development of a systematic risk-based approach
- Key factors and the development of a decision tree
- API
- Drug product
- Packaging
Safety Qualification of Impurities - Current Principles and Methods
- General approaches and regulatory framework for impurity qualification by safety threshold Derivation
- Generic and substance specific safety thresholds
- Threshold of Toxicological Concern (TTC) - different Scenarios
- Derivation of Permitted Daily Exposure (PDE) Limits
- Acceptable exposure calculations based on TD50 and their limitations
- Approaches for data poor substances: (Q)SARs and read-across
- Route-to-route considerations for safety thresholds
Nitrosamines and Other Genotoxic Impurities – Authorities Expectations and Dossier Requirements
- The assessor’s approach: principles of toxicological assessment
- Structural alerts
- Limits and Permitted Daily Exposure
- The ALARP principle
- Examples of low daily dose drug substances
- Impurities derived from alkylating agents (mesilate, besilate, tosilate, diisothionate); examples
- Nitrosamines – the Valsartan case
- Potential mutagenic residual solvents
- Impurities derived from metal catalysts
Workshop: Conducting a Nitrosamine Risk Assessment
In this Workshop the participants will work on several case studies and perform a risk assessment for different scenarios taking into account e.g. manufacturing equipment, dosage form of the drug product etc.