Annex 1 and Pre-Filled Syringes: What Changed, What to Do

The revised EU GMP Annex 1 (effective August 2023) has reshaped how pre-filled syringe lines are designed and qualified. The headline change: a mandatory Contamination Control Strategy (CCS) covering every step from incoming components to final sterile closure.

Key implications for PFS lines:

- Isolator or RABS is now the de-facto baseline

- Pre-use post-sterilization integrity testing (PUPSIT) for sterilizing filters

- Continuous viable and non-viable particle monitoring

- Documented contamination control strategy reviewed by quality

Manufacturers retrofitting older filling lines should plan for 9–18 months of upgrade and re-qualification.