all critical process parameters are followed and documented.
Quality Assurance (QA): Ensures that the stick pack filling process is validated in compliance with this SOP and meets all regulatory requirements. QA is also responsible for reviewing and approving all validation reports and documentation.
Production Supervisors: Oversee the stick pack filling process to ensure that operators follow the protocol, ensuring that the process is conducted in accordance with the approved validation plan.
Validation Team: Responsible for developing the stick pack filling process validation protocol, executing the validation runs, and analyzing the results to ensure compliance with product and regulatory requirements.
Maintenance Personnel: Ensures that all stick pack filling equipment, including powder feeders, sealing machines, and labeling machines, are calibrated and maintained during the validation process.

4) Procedure

The following steps should be followed for the validation of stick pack filling for oral powders:

1. Preparation for Validation:
1.1 Review batch records, product specifications, and regulatory guidelines to identify critical process parameters (CPPs) for the stick pack filling process, such as fill weight, sealing integrity, and labeling accuracy.
1.2 Develop a process validation protocol that includes the objectives, scope, equipment, process flow, and personnel involved in the validation process.
1.3 Ensure that all equipment, including powder feeders, stick pack filling machines, sealing units, and labeling systems, are calibrated and operational before initiating the validation process.
1.4 Prepare the oral powder formulation and stick pack packaging materials, ensuring that they are ready and comply with the product specifications.

2. Validation Protocol:
2.1 Protocol Design: The validation protocol should be based on the specific stick pack filling equipment used and the oral powder formulation. The protocol should outline the steps to verify fill weight, sealing quality, and labeling accuracy.
2.2 Defining Acceptance Criteria: Establish acceptance criteria for critical parameters such as fill weight, seal integrity, label placement, and packaging speed. Define acceptable limits for deviations in fill weight, sealing defects, and labeling errors.
2.3 Risk Assessment: Perform a risk assessment to identify critical quality attributes (CQAs) and corresponding critical process parameters (CPPs). This will help minimize the risk of packaging defects such as underfills, mislabels, or seal failures during the validation process.

3. Execution of Validation:
3.1 Filling Equipment Setup: Set up the stick pack filling equipment according to the specified parameters, ensuring that the correct powder formulation, fill weight, and sealing settings are used.
3.2 Filling Process Execution: Begin the filling process, monitoring the fill weight for each stick pack to ensure that it meets the established limits. Record fill weight data for each batch, and perform statistical sampling to confirm consistency.
3.3 Seal Integrity Testing: Perform seal integrity testing on a sample of sealed stick packs. Methods such as vacuum leak testing or dye penetration tests can be used to ensure that the seals are properly formed and that no leaks are present.
3.4 Labeling Inspection: Perform a visual inspection of the labeling process to ensure that the labels are applied correctly to each stick pack. Verify that the labels contain accurate information, such as batch numbers, expiry dates, and dosage instructions.
3.5 Packaging Speed Monitoring: Monitor the packaging speed during the process to ensure that it remains within the defined limits and does not affect packaging quality. Record production rates and verify that throughput is within acceptable limits.
3.6 Final Packaging Inspection: Inspect the final packaged stick packs to check for defects such as incorrect labeling, improper sealing, or damaged packs. Perform tests on a sample of stick packs to ensure packaging integrity is maintained throughout the batch.

4. Documentation and Reporting:
4.1 Record all data during the validation process, including batch records, equipment logs, process parameters, and test results for fill weight, seal integrity, labeling accuracy, and packaging speed.
4.2 Ensure that all forms, reports, and certificates are completed and signed by the responsible personnel.
4.3 Perform statistical analysis of the collected data to assess the consistency and capability of the stick pack filling process. This analysis should confirm that the process consistently produces products that meet the acceptance criteria.
4.4 Prepare a final validation report summarizing the results of the validation, including any deviations, corrective actions, and conclusions regarding the stick pack filling process.

5. Revalidation:
5.1 Revalidate the stick pack filling process if there are significant changes to the formulation, equipment, or critical process parameters.
5.2 Periodically conduct revalidation to ensure continued compliance with regulatory requirements and confirm that the process consistently produces high-quality products.

5) Abbreviations

• QA: Quality Assurance
• CPP: Critical Process Parameter
• CQA: Critical Quality Attribute
• SOP: Standard Operating Procedure
• HPLC: High Performance Liquid Chromatography

6) Documents

• Process Validation Protocol
• Batch Production Records
• Equipment Calibration Logs
• Stick Pack Filling Process Validation Reports
• Fill Weight and Seal Integrity Test Records
• Labeling Inspection Records
• Packaging Speed Monitoring Logs

7) Reference

• FDA Guidance for Industry: Process Validation
• International Council for Harmonisation (ICH) Q7: Good Manufacturing Practice Guide for Active Pharmaceutical Ingredients
• ISO 9001: Quality Management Systems – Requirements
• USP Chapter 1151: Pharmaceutical Dosage Forms

8) SOP Version

Version 1.0 – Effective Date: DD/MM/YYYY

Annexure

Template 1: Stick Pack Filling Process Record

Date	Time	Operator Initials	Fill Weight (g)	Seal Integrity Test Result	Packaging Speed (units/min)
DD/MM/YYYY	HH:MM	Operator Name	Weight in g	Pass/Fail	Speed in units/min

Template 2: Labeling Inspection Record

Batch No.	Inspection Date	Labeling Accuracy	Pass/Fail	Operator Initials
Batch Number	DD/MM/YYYY	Pass/Fail	Pass/Fail	Operator Name

Template 3: Packaging Speed Monitoring Record

Batch No.	Test Date	Speed (units/min)	Production Time (minutes)	Operator Initials
Batch Number	DD/MM/YYYY	Speed in units/min	Production time in minutes	Operator Name