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WHO Training Workshop on Pharmaceutical Quality, GMP and Bioequivalence with a focus

on artemisinines

János Pogány, pharmacist, Ph.D. consultant to WHO

Guilin, China, 10 January 2006E-mail: pogany@t-online.hu

Manufacturing of the Finished Pharmaceutical Product

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Abbreviations

API Active Pharmaceutical Ingredient

DRA Drug Regulatory Authority

EoI Expression of Interest

FDC Fixed-Dose Combination

FPP Finished Pharmaceutical Product

GMP Good Manufacturing Practices

ICH International Conference on Harmonization

MA Marketing Authorization

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Subjects for discussion1. Unit and batch formulas (compositions)2. Manufacturing process definition3. Manufacturing process control and validation4. Excipients5. FPP specifications 6. Container/closure systems7. Stability8. Labelling and product information9. Main points again

Guideline on Submission of Documentation for Prequalification of Multi-source (Generic)

Finished Pharmaceutical Products (FPPs)Used in the Treatment of HIV/AIDS, Malaria and

Tuberculosis

Section 3. Finished pharmaceutical product(s) [FPP(s)]

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3.3 FormulationStrength (label claim)  

SeeMaster Production Document Reference Number and/or Version Notes 

Batch Size (number of dosage units)  

Page

IngredientsQuality standard

Unit composition

Batch quantities

mg % kg %

           

           

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3.3 Formulation Composition of all components that are

mixtures (e.g., colourants, coatings, capsule shells, imprinting inks) should be given.

Where ranges of batch size are proposed for production –blending of batches or the use of sub-batches– the acceptability should be addressed.

Description of accompanying reconstitution diluent(s), if applicable

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3.5 Manufacturing process

A flow diagram should be presented giving the steps of the process and showing where materials enter the process. The critical steps and points at which process controls, intermediate tests or final product controls are conducted should be identified. Stages of manufacture, at which sampling is carried out for in-process control tests, should be indicated.

A narrative description of the manufacturing process, including packaging, that represents the sequence of steps undertaken and the scale of production should also be provided. For sterile products, details of sterilization processes and/or aseptic procedures used must be described.

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3.5 Manufacturing process Equipment should, at least, be identified by type (e.g., high-

speed granulator, fluid bed drier) and working capacity, where relevant.

Steps in the process should have the appropriate process parameters identified, such as time, temperature, or pH.

Associated numeric values can be presented as an expected range.

Numeric ranges for critical steps should be justified (e.g., blending parameters, LOD of the compression blend, tablet hardness, in-process as well as final yields).

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3.5 Manufacturing process In certain cases, environmental conditions (e.g.,

experimentally documented temperature and relative humidity for granules) should be stated.

A copy of the master formula and a copy of a manufacturing record for a real batch should be provided.

Documented evaluation of at least three (3) production batches (approved batch size) should be submitted to provide assurance that the manufacturing process will reliably meet predetermined specifications.

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3.6 Manufacturing Process Controls of Critical Steps and Intermediates

Critical Steps: Tests and acceptance criteria should be provided (with justification, including experimental data) performed at the critical steps of the manufacturing process, to ensure that the process is controlled.

Intermediates: Information on the quality and control of intermediates (e.g., granules blend for compression, tablet cores for film-coating) isolated during the process should be provided.

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3.7 Process Validation and Evaluation

3.7.1 New (for the generic manufacturer) FPPs Data should be submitted in the application for

prequalification demonstrating the validity (batch-to-batch reproducibility of FPP quality) of the manufacturing process.

Summary of the process validation and/or evaluation studies conducted (e.g., batch numbers, batch sizes, testing parameters, acceptance criteria), or

Summary of the proposed validation protocol for the critical steps or critical assays used in the manufacturing process (e.g., protocol number, parameters, results):

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3.7 Process validation report

3.7.1 New (for the generic manufacturer) FPPs Tabulated batch analytical and in-process control

data Certificates of analysis Batch production records Unusual findings, modifications or changes found

necessary Conclusions

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3.7 Process Validation and Evaluation

3.7.2 Established (for the generic manufacturer) FPPs Manufacturing as well as in-process and quality control testing

data should be evaluated. All but NLT a total of 10-25 consecutive batches, manufactured over the period of the last 12 months, should be used when reviewing the results, to provide a statistically significant picture. Trend analysis should be presented.

Rejected batches should not be included in the analysis but must be reported together with the reports of failure investigations. See Notes page

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3.8.2 Excipients described in BP, PhInt, PhEur, or USP All excipients, which are present in the product, should be listed,

even those present in small amounts, such as printing inks. Summary of the in-house specifications of compendial excipients

and supplementary tests not included in the monograph(s): For oils of plant origin (e.g., soy bean oil, peanut oil) demonstrate

the absence of aflatoxins or biocides. List of excipients that are of human or animal origin (including

country of origin): Summary of the information (e.g., sources, specifications,

description of the testing performed, viral safety data) regarding adventitious agents for excipients of human or animal origin:

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3.8.2 Excipients described in BP, PhInt, PhEur, or USP For excipients obtained from sources that are at risk of

transmitting Bovine Spongiform Encephalopathy (BSE)/Transmissible Spongiform Encephalopathy (TSE) agents (e.g., ruminant origin), a letter of attestation (with supporting documentation) should be provided confirming that the material is not from a BSE/TSE affected country/area. A copy of the letter may be found in:

Certificate of analysis for one batch of each excipient from the approved supplier should be provided.

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3.9.1 Specifications for the FPP

Standard Claimed (e.g., In-house, BP, PhEur, PhInt, USP)

 

Specification Reference Number and/or Version

 

Test Analytical Procedure(Type/Source/Version)

Acceptance Criteria

Batch release

Shelf life

       

       

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3.9.1 Specifications for the FPP

Justification of the specifications (e.g., evolution of tests, analytical procedures, and acceptance criteria, exclusion of certain tests, differences from compendial standard):

Acceptance criteria for degradants in FDC-FPPs should be established with reference to the API they are derived from. If an impurity results from a chemical reaction between two or more APIs, then its acceptance limits should be calculated with reference to the worst case (API with the smallest area under the curve). Alternatively, the content of such impurities

could be calculated in relation to their reference standards.

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3.9.1 Specifications for the FPP

Dissolution testing specifications should include all active components of the finished dosage form and utilize relevant media.

Validation of analytical procedures: State if in accordance with ICH or not, and mention any deviations. (All control methods, regardless of whether they are applicable to control at release or to the shelf life should be discussed here).

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3.9.1 Specifications for the FPP

Results of not less than three (3) batch analyses (including the date of manufacture, place of manufacture, batch size and use of batch tested) must be presented. The batch analysis must include the results obtained for all specifications at release.

Batch analysis results (n=?); do these confirm consistency and uniformity of the product? Do they indicate that the process is under control?

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3.10 Container/closure system(s) and other packaging

Description of the container closure systems, including unit count or fill size, container size or volume:

Materials of construction of each primary packaging component:

Summary of specifications of each primary and functional secondary (e.g., foil pouches) packaging components:

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3.10 Container/closure system(s) and other packaging

Identification of the material generally by infrared absorption spectrophotometry, with indication of the position of characteristic absorption bands. The infrared spectrum of the reference material should be provided: other methods of identification may be appropriate.

Identification of the main additives in particular those which are likely to migrate into the contents (such as antioxidants, plasticisers, catalysts, initiators, etc.... and, for PVC, phthalates, adipates and organic tin compounds).

Identification of dyes by using chromatographic or any other appropriate method.

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3.11 Stability testing

The design of the formal stability studies for the finished product should be based on knowledge of the behavior and properties of the API and the dosage form.

Stability studies should include testing of those attributes of the FPP that are susceptible to change during storage and are likely to influence quality, safety and/or efficacy.

It may be appropriate to have justifiable differences between the shelf life and release acceptance criteria based on the stability evaluation and the changes observed on storage.

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3.11 Stability testing

Report and discuss the results of stability testing as described in Annex 2. Organize data for all attributes separately and evaluate each attribute in the report.

Shelf life acceptance criteria should be derived from consideration of all available stability information.

Long-term studies should cover the whole shelf life. When available long-term stability data on primary batches do not cover the proposed shelf-life period granted at the time of approval, a commitment should be made in writing to continue the stability studies post approval. The post-approval stability protocol should also be provided and should be the same as that for the primary batches, unless otherwise scientifically justified.

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Letter of commitment

We, <name of applicant> undertake to continue long-term stability testing of <name of FPP> (batch numbers …….., ………. and ……………………) according to the stability protocol of primary batches, for a period of time sufficient to cover the whole pre-qualified shelf life (NLT 24 months ending ………………….) and to report any out-of-specification results immediately to WHO.

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3.11.3 Selection of Batches At the time of submission data from stability studies

should be provided for batches of the same formulation and dosage form in the container closure system proposed for marketing.

Stability data on three primary batches are to be provided. One of the three batches should be of production scale, the remaining two batches at least pilot scale. The composition, batch size, batch number and manufacturing date of each of the stability batches should be documented and the certificate of analysis at batch release should be attached.

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3.11.10 Evaluation

 Storage Conditions (C, % RH)

 

Batch Number

 

Batch Size

 

Container Closure System

 Completed (proposed)

Test Intervals (months)

         

         

(a) Summary of stress testing and results:

(b) Summary of accelerated and long term testing (e.g., studies conducted, protocols used, results obtained):

Summary and discussion of stability study results:Proposed storage conditions and shelf life (and in-use storage conditions and in-use period, if applicable):

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3.12 Container labeling

3.12.1 Outer packaging or, where there is no outer packaging, on the immediate packaging. Typical deficiencies: List of excipients known to be a safety concern for

some patients –e.g. lactose, gluten, metabisulfites, parabens, ethanol, or tartrazine– are not indicated.

Storage instructions do not reflect stability conditions.

3.12.2 Blisters and strips

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3.13 Product information for health professionals 3.14 Patient information and package inserts

Summary of Product Characteristics (SmPC) is frequently not approved by the national DRA. (Particular problem with artemisinin-derivative FPPs.)

The structure of SmPC does not follow that recommended by WHO.

Pharmaceutical data are not counter-checked against the quality part of the submission. Typical deficiencies include: Number(s) in the national register of FPPs. Date of first marketing authorisation/renewal of the authorisation.

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Points to be communicated to the applicant

A. General remark, if applicableB. Observations, informationC. Overall conclusion Reviewer’s conclusion, based on the review of the data on quality.

D. Post-approval commitmentsThe reviewer lists the outstanding commitments, which the applicant had undertaken in writing before the FPP was listed on the prequalification list.

Recommendations for inspectionThe reviewer list quality issues identified during the dossier assessment that require verification during a product-specific inspection.

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Change control Guidance on variations to a prequalified dossier. Conditions and requirements for 40 minor

changes are detailed. Typical examples: Change of API manufacturer Change of manufacturing site Change of batch size

Guideline on stability testing for applications for variations to a prequalified FPP (draft).

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Current regulatory developments

Pharmaceutical manufacturing operations are inefficient and costly.

Low efficiency is predominantly due to "self-imposed" constraints in the system (e.g., static manufacturing processes, focus on testing as opposed to quality by design).

ICH guidance Q9 (draft) describes the level of risk-mitigation achieved through quality by design and process understanding.

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Current regulatory developments Manufacturing processes of innovator and generic

manufacturers are fundamentally the same. Efforts are primarily directed towards reducing

variability in process and product quality characteristics and are not for changing the fundamental design of a manufacturing process.

Empirical methods are probably approaching their theoretical maximum effectiveness. New scientific understanding and new technologies can provide science- and engineering-based approaches.

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Current regulatory developments A process is well understood when:

all critical sources of variability are identified and explained

variability is managed by the process

product quality attributes can be accurately and reliably predicted

Process understanding inversely proportional to product quality risk.

Real time product release is on the regulatory horizon.

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Main points again The manufacturing process should be clearly

defined (site, composition, batch size, equipment, flow diagram, narrative) and well documented.

APIs, excipients and primary packing materials should be bought only from approved suppliers.

Batch-to-batch consistency of FPP quality should be achieved through validation and annual evaluation of product and process control results.

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Main points again Release specifications have to be reviewed at

the end of stability studies to establish if change of acceptance criteria is justified.

The SmPC and Patients’ leaflet should reflect the design, development and manufacturing information of the submission.

Attributes of prequalified FPPs should only be changed after approval of variation by WHO.

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THANK YOU

谢谢 !