Special Problems and Disconnects for Combination Products

As device organizations continue to evolve in the integration of combination products CGMP’s into their business, a holistic approach can prevent many unnecessary delays. This article provides some insights to consider when integrating stability testing into your device Quality System Requirements (QSR) system. It will discuss a number of quality systems that Stability may significantly impact. Part of the holistic approach should be a discussion that looks out to five years from today and defines where does the organization wants to be with regards to the management, development, manufacturing and compliance of their combination products business. The following six combination product requirements should have good quantitative measures for this five-year plan.

  1. Delivery
    • Packaging/Labeling codes and the expected order fill rate. If you have five codes that are expected to be delivered to customers on a monthly basis, the delivery challenge will be different than coordinating the manufacture of a 100 codes that will be delivered weekly. The impact of drug release testing and approvals can significantly impact your delivery objectives. Drug testing failure investigations may take longer than expected.
  2. Safety & Efficacy
    • The drug and combination product complaint and serious complaint (SAE/MDR) profile should be understood. This information should be incorporated into the risk management models.
  3. Identity
    • This must be addressed for every lot. Make sure the drug definitions of lot and batch are well understood, this may affect the number of tests to be conducted and the infrastructure required.
  4. Strength
    • How the device affects the strength of the drug may require special analytical methods. These analytical methods should meet ICH Q2 Analytical Methods.
  5. Purity
    • Identifying all the impurities and degradants for both device and drug will be important. Also any process that can affect the impurities and/or degradants needs to be well understood and a control strategy implemented.
  6. Quality
    • Once the drug and the device are combined the combination product quality characteristics must be defined. There can be effects due to storage, environment, contact time between the device and the drug and use.. A useful exercise is to match the critical-to-quality (CQA) characteristics with relevant product complaints. A control strategy that addresses the CQA’s of both product and process characteristics could be a good source of preventative measures.

It is important to identify key functions affected by these requirements (i.e. Stability) and assess the functions ability to meet them consistently. Part of the strategy should ensure that these functions have the ability to consistently meet the combination product requirements.

Figure 1 is a framework that can be used to help organizations do the following:

Figure 1. Combination Products Framework

Integrating a new set of CGMP’s (21CFR 820) into an organization that is already operating to a well-established set of QSR’s (21 CFR 820) can be disruptive. Often some basic planning and analysis can make a significant difference in the implementation effectiveness. Before beginning to evaluate the organization’s ability to integrate these new combination product 211 CGMPs into your quality system determine the foundation that would be necessary for each CGMP (21 CFR Part 4) you plan to implement. Once you decide what are the systems, personnel and infrastructure needed, then ensure your organizations relevant core competencies can address these needs. Also assess the maturity and consistency of their performance or at what stage of experience they are operating.

Exclusive VIDEO: How to Gather Clinical Evidence for Combination Products | WATCH NOWA good understanding of how the CGMP’s defined in 21 CFR Part 4 can impact the values of the organization can help you proactively address personnel concerns. Device manufacturers have a good understanding of the safety and efficacy of their products; however, these new CGMP’s may lead you to ask questions you did not previously consider (i.e., questions about the control of degradants, stability indicating methods, reserve samples, control of pyrogen).  Employees may see these new requirements as a threat to the effective execution of their functional responsibilities. You may find that maintaining your compliance performance is impacted and some support is needed to get compliance to the level at which you are accustomed to operating.

The expectation is that these new CGMP’s will long term impact profits; temporarily there may be an impact. This should be defined and discussed early in the process.

In particular you may need to change or add facilities and/or new equipment.  As you begin to pull together all of these CP CGMP insights that may impact your values, foundation and functions together, you must be specific what is expected of each function. An important aspect of your plan will be to make sure key stakeholders in impacted functions are on board with the approach. Make sure they agree with the need, the plan, what is acceptable and when this level of performance will be in place.

Many device organizations have chosen the Streamline approach for their compliance with the combination products CGMPs. Specifically, the streamlined approach provides that a device organization manufacturing combination products may meet the requirements of both the drug CGMPs and device QS regulation by designing and implementing a CGMP operating system that is demonstrated to comply with the following:

  • The QS regulation and the following provisions from the drug CGMPs in accordance
    with 21 CFR 4.4(b)(2) (considered a QS regulation-based streamlining approach):

(i)         21 CFR 211.84.  Testing and approval or rejection of components, drug product containers, and closures

(ii)        21 CFR 211.103. Calculation of yield

(iii)      21 CFR 211.132.  Tamper-evident packaging requirements for over-the- counter (OTC) human drug products

(iv)      21 CFR 211.137. Expiration dating

(v)        21 CFR 211.165.  Testing and release for distribution

(vi)      21 CFR 211.166. Stability testing

(vii)     21 CFR 211.167. Special testing requirements

(viii)   21 CFR 211.170. Reserve samples

A requirement for 211.137 Expiration dating is to have it determined by appropriate stability testing. For single-entity combination products, you will need to define the applicable standard of drug identity, strength, quality and purity.  Most device organizations are well prepared for the quality and identity requirements; however, strength and purity can be difficult. How you measure the strength of the drug when it is physically or chemically combined with a device and how you define the specification can be challenging. Another area that has presented some degree of difficulty is purity, particularly understanding the degradant products of the drug and how the processing affects the degradants of the combination product.

A helpful FDA technical guidance the device community should understand is “INSPECTIONAL TECHNICAL GUIDANCE; Expiration Dating and Stability Testing for Human Drug Products, 10/18/85 Number: 41. The agency provides guidance on key areas of Expiration Dating and Stability Testing. Some of the areas they cover are:

EXPIRATION DATING

STABILITY TESTING  

To help you design a stability program you should consult experts on how to incorporate the applicable sections of the ICH Quality guidances into your program:

Final Rule: CGMP Requirements for Combination Products and Guidance Document; the Combination Products CGMP Draft Guidance

Do take the time to understand the Comments in the Rule, they provide key Agency insights.  A few points to consider from the Combination Products CGMP regulation and the Draft Guidance when preparing your approach to comply with the Stability Testing requirements.

During this article it has been our objective to share with you insights on the many quality systems Sterility Testing can impact.  This is not an exhaustive list; it is intended to stimulate your strategy. Integration of drug CGMP’s into a device environment is a significant undertaking that should be led by senior management with a commitment to a long-term vision of where they expect their combination product business to be. We have discussed some very complicated requirements that will require time, resources and a sustained effort to bring about the commensurate skills necessary to meet the needs of your combination products business objectives.

Resources

  1. FDA. INSPECTIONAL TECHNICAL GUIDANCE – Expiration Dating and Stability Testing for Human Drug Products.
  2. Federal Register. Current Good Manufacturing Practice Requirements for Combination Products.
  3. International Council for Harmonisation – Quality  http://www.fda.gov/drugs/guidancecomplianceregulatoryinformation/guidances/ucm065005.htm
  4. Guidance for Industry ANDAs:  Stability Testing of Drug Substances and Products – Questions and Answers 
  5. Guidance for Industry and FDA Staff: Current Good Manufacturing Practice Requirements for Combination Products – Draft Guidance
  6. Guidance for Industry –  Investigating Out-of-Specification (OOS) Test Results for Pharmaceutical Production  October 2006.

Related Articles

About The Author

Exit mobile version