Process validation for DEFRATAJ follows the lifecycle approach described in ICH Q8 / Q9 / Q10 and mainstream regulatory guidance: Stage 1 - Process Design; Stage 2 - Process Qualification (including PPQ); Stage 3 - Continued Process Verification. Every strength is manufactured under a validated process with documented evidence of consistent, reproducible output.
Stage 1 - Process Design #
- Quality Target Product Profile (QTPP) defined for DEFRATAJ dispersible tablets
- Critical Quality Attributes (CQAs) identified: assay, content uniformity, dissolution, disintegration, impurities, tablet mechanical properties
- Risk assessment (ICH Q9 - FMEA / risk ranking) identifies Critical Process Parameters (CPPs) and Critical Material Attributes (CMAs)
- Design-of-Experiments (DoE) studies establish operating ranges and design space (where applicable)
Stage 2 - Process Qualification (PPQ) #
- Equipment IQ (Installation Qualification), OQ (Operational), PQ (Performance)
- Cleaning validation per product family, with swab and rinse limits tied to toxicology
- Process Performance Qualification (PPQ) on three consecutive commercial-scale batches per strength
- PPQ batches tested at higher-than-routine sampling frequency to demonstrate batch homogeneity
Sampling Plan for PPQ #
| Operation | Sampling |
|---|---|
| Blending | Multiple locations for blend uniformity |
| Compression | Tablets sampled at start / middle / end of run; individual tablet analysis for assay and content uniformity |
| Coating (if applicable) | Weight gain monitoring; dissolution at defined points |
| Packaging | Checkweigher verification; leak test on blisters |
Stage 3 - Continued Process Verification (CPV) #
- Statistical trending of CQAs per batch over time
- Process Capability (Cp / Cpk) analysis for key parameters
- Deviations, trends and anomalies reviewed at Management Review
- Annual Product Quality Review (APQR) consolidates all CPV data
Change Management #
Any post-validation change is handled through formal Change Control, with impact assessment on CQAs/CPPs and re-validation as required. Post-approval variations are filed with the relevant regulatory authority.
Cleaning Validation #
Cleaning validation is performed on a product-family / worst-case basis. Acceptance criteria are derived from toxicologically justified Permitted Daily Exposure (PDE) values, supplemented by visual and swab limits. Cleaning verification is performed on routine batches.