Overview of USP Chapter


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Overview of USP Chapter

  1. 1. Overview of USP Chapter <823> for IND and RDRC Regulated PET Compounding Distributed Manufacturing of PET Radiopharmaceuticals for Multi-Center Clinical Trials Society of Nuclear Medicine Webinar July 28, 2009 Sally W. Schwarz, MS, BCNP Director Clinical PET Radiopharmaceutical Production Washington University St. Louis Department of Radiology
  2. 2. US Food & Drug Administration Modernization Act (FDAMA) 1997  1997: US Food & Drug Modernization Act (FDAMA) required revisions to Current Good Manufacturing Practice (cGMP) for PET Radiopharmaceutical (RP) production  FDAMA required a new approval path and separate Current Good Manufacturing Practices (cGMPs) for PET from cGMPs for drugs  Prior to adoption of final PET cGMP rule, FDAMA requires PET Radiopharmaceutical (RP) production to follow:  United States Pharmacopeia (USP) PET RP monographs, if available  USP General Chapter <823> for Production of PET RPs • USP subcommittee being formed to review  2005: PET CGMP Proposed Rule & Guidance published  2009: Still waiting for final rule
  3. 3. Proposed Rule cGMP for PET September 20, 2005 The proposed §212.5(b) provides that for investigational and research PET drugs, cGMP would be met by producing PET drugs in accordance with USP General Chapter <823> “Radiopharmaceuticals for Positron Emission Tomography – Compounding”. PET Drugs produced under Investigational New Drug Application (IND) (this would apply to Phase 1 and 2) or PET Drugs approved through a Radioactive Drug Research Committee (RDRC)
  4. 4. Overview USP Chapter <823> • Procedures/Process (Current Chapter 823; revision is planned) – Components, Materials and Supplies – Written Procedures  Acceptance Criteria Compounding Computers & Automated Equipment Verification (3 consecutive runs) & Stability • Facilities • Quality Control • Sterilization & Sterility Assurance
  5. 5. Control of Components, Materials and Supplies • Establish written specifications Identity, purity & quality of components Appropriate storage • Log-in each lot of shipments of components; If no expiration date, must assign one. • Determine each batch of components in compliance with written specifications (procedures, tests, and/or certificates of analysis) • Store components in controlled access area according to established conditions.
  6. 6. Compounding Procedure Verification 1. Written acceptance criteria for identity, purity & quality of each PET drug (If USP monograph exists = minimum acceptance criteria) 2. Written procedures for compounding  Master file of Written compounding procedures (Outdated copies retained)  Incorporate 0.22 um for parenteral administration; 0.45 um for inhalation  Routinely updated at least annually 1. Verification Studies  Three consecutive runs are required initially & for any change having potential to alter identity quality or purity  Stability testing and expiration dating—meet acceptance criteria at expiry
  7. 7. PET Radiopharamceutical (RPh) Compounding Process  Inspect compounding area and equipment before use for cleanliness  Label final PET RaPh container prior to starting PET drug name and lot number  Compound PET RaPh according to written, verified procedure with appropriate written batch record  Use appropriate components  Responsible individual initials—including each critical step  Raw analytical data  Signature & date of individual assuming overall responsibility
  8. 8. FDAAudit Inspectional Observations (FDA-483)  Failure to audit procedures (SOPs) on regular basis & update  Failure to investigate failed batch & deviations (should be in writing)  Failure to train personnel to perform assigned tasks  Found production equipment:  Not qualified  Not calibrated  Not properly maintained
  9. 9. Quality Control Procedures  Written QC procedures  Verification of QC equipment and procedures used  System suitability testing must be confirmed on installation of QC equipment and after repair HPLC, GC, analytic instruments  Check correct operation on scheduled basis  Maintenance performed—written scheduled basis  Dose Calibrators: Assay bulk radioactivity and dispensed dosages Perform applicable tests
  10. 10. Quality Control Requirements Pre-Release:  PET RaPh T1/2≥ 20 minutes (on Batch); T1/2<20 minutes ( on QC Sub Batch) – Post-filtration integrity test of 0.22 µm sterile filter (e.g. Bubble Test) – pH – Visual inspection – Radiochemical purity /identity *** – Radionuclidic identity – Specific activity – Residual solvent analysis, and other toxic chemicals – BET (20 min gel clot, or other recognized procedure) Post-Release:  Sterility may inoculate test, within 24 h following preparation
  11. 11. Endosafe PTS® System  PTS® is a software-driven spectrophotometer for measuring and documenting endotoxin.  Unique cartridge containing dry, pre- calibrated reagents.  Each cartridge contains duplicate channels for analysis of sample and positive control.  PTS® is particularly suited for PET RaPh because test requires  ~17-20 minutes  Requires < 0.1 mL of diluted product  NO preparation of endotoxin standards.
  12. 12. FDAAudit Inspectional Observations (FDA-483) Lack of assurance that QC test results are reliable & accurate  QC equipment; – Not qualified – Not calibrated – Not maintained  No equipment suitability performed (USP Chapter <621>)  Inadequate reference standards used Inadequate QA/QC oversight  Failure to investigate failed batch  Failure to update procedures
  13. 13. Qualification of Filtration Process  Sterile Filters:  COC examined and maintained for each lot of filters  COA obtained from the company listing microbial retention challenge  Each lot of filters must be tested for integrity : Acceptance Criteria  After PET drug production, filter tested for integrity pre- release e.g. Bubble Point Test  The bubble point pressure is the pressure at which bubbles first appear from a submerged inlet tube in the receiving vessel.  Nitrogen gas flow increased until the bubbles appear (e.g. most filters must reach > 50 psi. * Nitrogen Gas * Pressure depends on the filter used
  14. 14. Facility Environmental Controls  Work area is clean  Aseptic hood located in low traffic area  Clean laboratory clothing worn  Aseptic techniques used  Disinfect final product septum with sterile 70% alcohol
  15. 15. Aseptic Technique Training Requirements  Didactic training: pass written exam  Training in proper garbing & gloving with documented visual observation audits  Media-Fill Test Procedures – New preparer: Pass 3 separate Media-Fill Procedures – Annually for personnel who currently prepare (compound) PET RaPh
  16. 16. PET RaPh Final Product Vial Assembly Performed In Aseptic Hood PET RaPh final product containers must be assembled in Class 100 environment (LFH or Isolator) Gloved hands are disinfected before entering hood Daily disinfection of surfaces before use Microbiological Testing periodically e.g. weekly (per FDA, NOT monitoring) Contact plate-surfaces Settle plate/dynamic air sampler Airborne, nonviable particle count less often
  17. 17. FDAAudit Inspectional Observations (FDA-483) Frequency of environmental monitoring— contact plates, touch plates  Weekly is not acceptable  Should “monitor” environment for each set-up of final product vial  Can assemble all final product vials for the day, and keep them in LAF Use of non-sterile disinfectant to sanitize LAF No media fill testing performed
  18. 18. Microbiological Testing of Finished Product • Innoculated no later than 24 hours after compounding • If sterility test fails, an investigation must be initiated to identify the cause
  19. 19. FDAAudit Inspectional Observations (FDA-483)  Lack of assurance that PET drug is sterile  No growth promotion testing of media performed  Must have validation data for hold time (eg. 24 hours); assure still have viable product  Inadequate incubation temperature control  Automatic sterility re-test without investigation
  20. 20. Class 100 (ISO Class 5) PET Dose Drawing Station  Chapter <823> supersedes Chapter <797> for PET RP compounding, but upon release of PET RP as finished drug product, further manipulation such as dispensing, contents of Chapter <797> apply. PET Dose Drawing Device In Class 100 Environment Shielded Dose Calibrator
  21. 21. Thank-you! schwarzs@wustl.edu
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