Scope

This SOP applies to the formulation development team, packaging development, analytical development, and quality assurance personnel involved in PFS design, formulation filling trials, and compatibility studies within sterile injectable manufacturing.

3. Responsibilities

• Formulation Scientist: Develops stable PFS-compatible formulations.
• Packaging Development Officer: Selects appropriate syringe system and evaluates material compatibility.
• Analytical Chemist: Performs extractable/leachable, stability, and physicochemical testing.
• QA Department: Verifies compliance with regulatory and GMP guidelines.

4. Accountability

The Head of R&D is accountable for successful development and compatibility validation of prefilled syringe systems for injectable products as per regulatory and GMP requirements.

5. Procedure

5.1 Prefilled Syringe Component Selection

1. Select syringe type (e.g., glass, cyclic olefin polymer, siliconized) based on drug product compatibility.
2. Consider factors such as:
   • Drug adsorption to barrel material
   • Plunger stopper compatibility
   • Lubrication effects (e.g., silicone oil)
3. Document material specifications (Annexure-1).

5.2 Formulation Design

1. Ensure isotonicity, pH range (4.5–7.5), low viscosity, and absence of particulates.
2. Design solution to minimize interaction with syringe components.
3. Perform forced degradation to understand reactive sites.

5.3 Compatibility Studies

1. Perform Extractables and Leachables (E&L) studies under ICH conditions.
2. Analyze for:
   • Siloxanes from siliconized components
   • Heavy metals or polymers
   • Label adhesive or ink migration
3. Record results in the Compatibility Data Log (Annexure-2).

5.4 Syringe Filling Trials

1. Fill pilot batches using aseptic technique or terminal sterilization if applicable.
2. Inspect for defects: cracks, silicon oil droplets, plunger movement.
3. Check plunger glide force and hold-up volume (residual volume).

5.5 Container Closure Integrity Testing (CCIT)

1. Test seal integrity using:
   • Vacuum Decay
   • Dye Ingress
   • Helium Leak Detection (for critical drugs)
2. Document CCIT test results in Annexure-3.

5.6 Stability Study in Prefilled Syringes

1. Conduct real-time and accelerated stability as per ICH Q1A guidelines.
2. Test parameters:
   • Appearance, assay, degradation products
   • Extractables/leachables at T0, T1, T3, T6 months
   • CCIT post-exposure

5.7 Documentation and Reporting

1. Compile the Formulation and Compatibility Report (Annexure-4).
2. Submit development summary to QA for archiving.

6. Abbreviations

• PFS: Prefilled Syringe
• CCIT: Container Closure Integrity Testing
• ICH: International Council for Harmonisation
• E&L: Extractables and Leachables
• QA: Quality Assurance

7. Documents

1. Syringe Material Specification Sheet – Annexure-1
2. Compatibility Study Data Log – Annexure-2
3. CCIT Summary Report – Annexure-3
4. Formulation & Compatibility Report – Annexure-4

8. References

• ICH Q1A(R2): Stability Testing
• ICH Q9: Quality Risk Management
• USP <1207>: Container Closure Integrity Testing

9. SOP Version

Version: 2.0

10. Approval Section

	Prepared By	Checked By	Approved By
Signature
Date
Name
Designation	Formulation Scientist	QA Officer	R&D Head
Department	R&D	Quality Assurance	Sterile Injectables

11. Annexures

Annexure-1: Syringe Material Specification Sheet

Component	Material	Supplier	Tested By
Barrel	Glass Type I	Gerresheimer	Sunita Reddy
Plunger	Bromobutyl	West Pharma	Rajesh Kumar

Annexure-2: Compatibility Study Data Log

Batch No.	Study Condition	Observation	Analyst
PFS-B-001	40°C/75%RH – 1M	No change	Arvind Joshi

Annexure-3: CCIT Summary Report

Test Method	Batch No.	Result	Performed By
Vacuum Decay	PFS-B-001	Pass	Sunita Reddy

Annexure-4: Formulation & Compatibility Report

Product	Drug-X Prefilled Syringe
Batch No.	PFS-DEV-001
Prepared By	Rajesh Kumar
Date	10/06/2025

Revision History

Revision Date	Revision No.	Details	Reason	Approved By
05/01/2022	1.0	Initial SOP release	New development procedure	QA Manager
18/06/2025	2.0	Added CCIT and E&L details	Regulatory compliance	QA Manager