Home Forums General Discussion Inverted Samples for Lyophilized Product Studies

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  • John O’Neill
    Post count: 67

    Posted on behalf of Baher Doud

    Is there an ICH requirement or even an industry expectation to perform “inverted” orientation for the stability study of Lyophilized DP? The intended storage condition is 2-8C.


    John O’Neill
    Post count: 67

    Here’s what I’ve found.
    FDA Stability Guidance 1998 (Withdrawn)
    2500 e. Container/Closure
    2501 Changes in the quality of the product may occur due to the interactions between the formulated
    2502 biotechnological/biological product and container/closure. Where the lack of interactions cannot be
    2503 excluded in liquid products (other than sealed ampules), stability studies should include samples
    2504 maintained in the inverted or horizontal position (i.e., in contact with the closure) as well as in the
    2505 upright position, to determine the effects of the closure on product quality.

    WHO 2017
    The orientation of the product during storage, i.e. upright versus inverted,
    640 may need to be included in a protocol where contact of the product with
    641 the closure system may be expected to affect the stability of the products
    642 contained (e.g. liquids and semisolids), or where there has been a change
    643 in the container closure system.

    Couldn’t find any mention of inverted samples

    Conclusion: Looks like both a regulation and an expectation. On the basis of the above, any regulator could ask for the inverted data. Some manufactures may, with justification, obtain Lyo/Package contact data in the development phase and use that to skip the inverted testing, but it would be best to check with the regulators before acting on that assumption.

    Note that many companies who perform the inverted testing typically do not execute protocols that entirely mirror the upright samples schedule. Often, the inverted sample testing is added to the standard upright sample protocols on a periodic basis. (For example, if the standard protocol was for 0, 3, 6, 9, 12 months and annually thereafter, the inverted samples may also be tested only at 6, 12 and annually) You would need to prepare a justification based on development data and if your studies were intended for registration, speaking with the regulatory authority prior to acting would be wise.

    Best regards, John O’Neill

    John O’Neill
    Post count: 67

    Posted on behalf of Baher Daoud

    Thanks for the information.
    I also received confirmation from other colleagues that they do place lyophilized DP vials on stability at inverted orientation especially during phase 3 and PPQ.

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