USP Chapter 795 Beyond-Use Limits define how long a nonsterile compounded preparation may be used after it is made. As a pharmacy technician, you will apply these limits when labeling, storing, and documenting compounded preparations.
What Are USP Chapter 795 Beyond-Use Limits?
Under USP <795>, a beyond-use date (BUD) is the date after which a compounded nonsterile preparation (CNSP) must not be used. Default limits depend on the dosage form, water content, and preservative: nonaqueous/solid dosage forms up to 180 days, preserved aqueous forms up to 35 days at controlled room temperature or refrigerated, and nonpreserved aqueous forms up to 14 days refrigerated. If the manufacturer’s expiration date or valid stability data is shorter, use the shorter date.
Why USP Chapter 795 Beyond-Use Limits Matter for Technicians and the PTCB
These limits matter because technicians help assign and label BUDs, choose correct storage conditions, and document compounding records. The PTCB exam expects you to recognize nonsterile compounding operations, BUD rules, labeling requirements, and storage practices. You do not need to memorize every formulation, but you must know the default categories.
Applying USP Chapter 795 Beyond-Use Limits in Practice
Example: a compounded oral suspension without a preservative would default to 14 days refrigerated under USP <795>. If the same aqueous preparation is preserved, the default limit can be 35 days at controlled room temperature or refrigerated. Always verify the formula, preservative status, storage requirements, and any shorter manufacturer expiration before labeling.
Common Mistake With USP Chapter 795 Beyond-Use Limits
⚠️ A common mistake is using “30 days” for every nonsterile compound or assuming refrigeration extends the BUD indefinitely. 💡 Pro tip: check whether the preparation is aqueous or nonaqueous and preserved or nonpreserved before selecting the BUD, then label the exact date and storage condition.
Quick Reference: USP Chapter 795 Beyond-Use Limits
- Nonaqueous/solid CNSP: default up to 180 days
- Preserved aqueous CNSP: default up to 35 days at CR or refrigerated
- Nonpreserved aqueous CNSP: default up to 14 days refrigerated
- Never exceed a shorter manufacturer expiration or stability limit
- Label BUD, storage condition, and compounding documentation
Related Concepts
Beyond-Use Date (BUD), Nonsterile Compounding, and USP Chapter 797