CSPT - Compounded Sterile Preparation Technician Beyond-Use Dating and Stability Questions and Answers Flashcards

Which analytical method is considered the gold standard for confirming chemical stability and potency retention in a CSP for BUD validation purposes?

Answer: Stability-indicating assay method (SIAM)

A stability-indicating assay method (SIAM) can differentiate the intact drug from its degradation products, making it the gold standard for potency confirmation.

USP requires that BUD labels on CSPs include which of the following elements?

Answer: Date and time of preparation, storage conditions, and BUD

BUD labels must include the preparation date and time, required storage conditions, and the beyond-use date/time to ensure safe patient use.

A CSP is inadvertently stored at room temperature for 4 hours before being transferred to refrigeration. The assigned refrigerated BUD should be:

Answer: Recalculated to account for the time already elapsed at room temperature

Time stored at room temperature consumes stability, so the BUD must be recalculated to subtract the equivalent degradation already incurred.

Which USP chapter establishes standards for particulate matter in injections and is relevant to the physical stability assessment of CSPs?

Answer: USP

USP specifies limits for particulate matter in injections, making it directly relevant to the physical stability evaluation of CSPs.

An ophthalmology clinic requests a CSP eye drop with a 30-day BUD. The preparation uses only sterile commercial products as starting ingredients, and no sterility testing is performed. Under USP , this request is:

Answer: Not achievable without sterility testing data supporting the extended BUD

Without sterility testing or peer-reviewed stability data, a 30-day BUD exceeds Category 2 defaults and cannot be assigned regardless of ISO classification.

What is the primary reason why multi-dose vials (MDVs) have a 28-day in-use BUD after initial puncture, according to USP ?

Answer: The preservative system becomes less effective over time after repeated punctures

Repeated needle punctures can introduce contaminants that overwhelm preservatives over time, so the 28-day limit reflects the window during which the antimicrobial preservative system remains reliably effective.

A hospital pharmacy receives a sterility test failure for a batch of CSPs. Regarding BUD, what is the immediate required action?

Answer: Quarantine and recall all affected CSPs from that batch

A sterility test failure requires immediate quarantine and recall of all affected CSPs because continued use poses a direct patient safety risk.