The Postapproval Management Plan - Pharmaceutical Technology

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The Postapproval Management Plan
A Tool to Apply Science and Risk-Based Approaches.


Pharmaceutical Technology
Volume 33, Issue 1, pp. 82-86

Reporting methods

Critical in-process controls (CIPCs) include tests and measurements performed during production to monitor and, if appropriate, adjust the manufacturing process to ensure that a drug substance or drug product's critical quality attributes are met. Deletion of a CIPC is typically reported in a prior approval supplement. Under a PMP, the following protocol would be used to add or tighten a CIPC or to add additional testing or parameters to the manufacturing process. These changes would be reported in a company's annual report. For example, the report may present:

  • Appropriate rationale to support the change
  • Proof that the product using the new CIPCs is equivalent to the previously approved product by means of appropriate analytical testing (e.g., dissolution profiles, batch release data)
  • Results for tests listed in the drug product specification for the first three production batches following the change.


Table III: Sample drug substance section of the postapproval management plan (acceptance criteria applied to confirm that a change has not adversely impacted the product).
To expand the range of a CIPC, changes would be reported in a similar manner but through a CBE-30 . Table III shows acceptance criteria that could be applied to confirm that the change has not adversely impacted the product.

Packaging

A PMP can be used to address packaging. The following is an example of a proposed change to the packaging material for an API. The change could be submitted in an annual report rather than a CBE-30 if the criteria are met. The protocol could allow for reduced data requirements by proposing the use of moisture vapor transmission rates in place of stability data.


Table IV: API packaging material protocol.
Drug substance X will be packaged in a low-density polyethylene (LDPE) primary liner that is heat-sealed. This primary liner will be placed inside a secondary laminated foil liner. The secondary liner will be heat-sealed. A silica gel desiccant package for moisture absorption will be placed between the primary and the secondary liner. The sealed liners may then be placed in an appropriate container such as a fiber drum, corrugated container, polyethylene drum, or metal drum for shipping and handling.

The materials of construction of the primary packaging component LDPE liner comply with the requirements of the applicable sections of current federal regulations for indirect food additives, 21 CFR Parts 177, 178, and 182.

The following sample protocol would be used for a change in packaging material, with the change and supporting data provided in an annual report.

For packaging material that is in direct contact with the drug substance:

Six months of accelerated stability data for a minimum of three batches of drug substance X per the following stability protocol: All registered acceptance criteria for the analytical properties studied must be met. A minimum of one batch of drug substance X will be placed on stability at 25 C and 60% relative humidity (RH) either after or concurrent with the accelerated stability study.

For packaging materials that are not in direct contact with the drug substance:

Option 1: Six months of accelerated stability data for a minimum of three batches of drug substance X as per the following stability protocol: All registered acceptance criteria for the analytical properties studied must be met. A minimum of one batch of drug substance X will be placed on stability at 25 C and 60% RH either after or concurrent with the accelerated stability study.

Option 2: Data demonstrating that the new packaging and previous packaging design have equivalent or better moisture vapor transmission rates.

Conclusion

An effective PMP is product specific and based on sound scientific knowledge. A PMP also incorporates risk-management principles and results with a more predictable and science-based approach to product life-cycle management. Appropriate identification of the critical parameters and change mechanisms is of paramount importance to achieve the "desired state." The desired state, according to FDA, is: "A maximally efficient, agile, flexible pharmaceutical manufacturing sector that reliably produces high quality drug products without extensive regulatory oversight" (4). Overall, the PMP can reduce hurdles to continuous improvement in pharmaceutical manufacturing, thereby opening the door to reduced costs, increased efficiency, and improved safety.

Paula S. Hudson, R.Ph., RAC*, is a manager of CMC Regulatory Affairs and Denyse D. Baker, P.E., RAC, is a principal regulatory scientist, both at Eli Lilly and Company, Lilly Corporate Center, Indianapolis, IN 46285, tel. 317.277.6730, fax 317.655.6813,

*To whom all correspondence should be addressed.

Submitted: Apr. 30, 2008. Accepted: July 28, 2008.

References

1. ICH, ICH Q8 Pharmaceutical Development (Geneva, Nov. 10, 2005).

2. ICH, ICH Q9 Quality Risk Management (Geneva, Nov. 9, 2005).

3. ICH, ICH Q10 Pharmaceutical Quality System (Geneva, June 2008).

4. J. Woodcock, MD, "Pharmaceutical Quality in the 21st Century—An Integrated System Approach," presented at AAPS Workshop on Pharmaceutical Quality Assessment—A Science- and Risk-Based CMC Approach in the 21st Century (Bethesda, MD), Oct. 5, 2005.


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