Final answer:
The Beyond-Use Date for Medium-risk CSPs stored at refrigerator temperature is 9 days as per USP Chapter 797 guidelines, reflecting the time the compounded medication is expected to maintain sterility, stability, and potency.
Step-by-step explanation:
The Beyond-Use Date (BUD) for Medium-risk Compounded Sterile Preparations (CSPs) stored at Refrigerator temperature is 9 days. This is according to the guidelines set by the United States Pharmacopeia (USP) Chapter 797, which outlines the standards for preparing compounded sterile medications. It is important to note that the BUD is different from an expiration date. An expiration date is the time during which a commercially available medication, if stored and handled properly, is expected to remain within its specified integrity, efficacy, and chemical stability. In contrast, a BUD is determined for medications that are compounded in a pharmacy and represents the date after which a compounded sterile preparation (CSP) should not be used; it reflects the time during which the preparation is expected to remain sterile, stable, and of the stated potency, provided that it has been stored according to the conditions on the label.