Compounded GLP-1 Storage and Beyond-Use Dates
Understand why compounded vial storage depends on the dispensing pharmacy. Separate expiry, beyond-use date and after-opening instructions.
Last updated: 2026-10-10
There is no universal compounded-vial storage rule
A branded product's storage allowance is not evidence for a different compounded formulation. Start with the dispensing pharmacy's label and written instructions for the actual vial. This page does not assign a temperature range or a number of days to an unspecified compounded product.
Three dates to locate
- Expiration date: a printed expiry may refer to a manufactured product or ingredient. Establish which item the date describes.
- Beyond-use date (BUD): a date assigned to a compounded preparation. Read the conditions attached to it.
- After-opening or first-puncture limit: a separate instruction that may be relevant after a container is first accessed.
If you cannot tell how these dates interact on your label, ask the pharmacy for the applicable final date in writing. Do not calculate a replacement date using a brand's pen allowance or the amount of liquid remaining.
Questions for the dispensing pharmacy
- What exact storage conditions apply before and after the vial is first accessed?
- Which date or interval controls this specific preparation?
- Does the label need a first-puncture date recorded?
- What should I do after a delivery delay or uncertain temperature exposure?
- Have the concentration, formulation or written instructions changed with this refill?
A simple information record
Keep the pharmacy name and phone number, product and ingredient names, concentration, label date, BUD, relevant first-use date, and any temperature incident. This is a record for discussing the label; it is not a stability calculator.
Do appearance and arithmetic establish usability?
No. This site cannot inspect a product or determine its stability or sterility. A correct mg-to-mL calculation does not validate a temperature exposure or extend a use date. Ask the dispensing pharmacy about the actual preparation.
Why concentration belongs in the record
The FDA alert on compounded semaglutide describes measurement confusion involving differing concentrations. Our practical response is to recheck the current label each time rather than carry forward numbers from another vial.
Use the label guide and checking guide for measurement questions. For branded products, choose the semaglutide or tirzepatide overview instead.