Does vancomycin expire?
The printed date covers the sealed pack. Once vancomycin is opened, mixed or diluted, its label sets a second and usually much shorter limit — quoted below, per product.
Shortest limit on any vancomycin label: 4 hours
“If prompt fluid transfer cannot be accomplished, discard the contents no later than 4 HOURS after initial closure puncture.”
That applies to the product it is printed on, not to every form of vancomycin — check which one you have against the list below.
What the labels say
“If prompt fluid transfer cannot be accomplished, discard the contents no later than 4 HOURS after initial closure puncture.”
On the label for Vancomycin Hydrochloride · DailyMed
“Discard the container no later than 4 hours after initial closure puncture.”
On the label for Vancomycin Hydrochloride · DailyMed
“Discard any unused portion after 4 HOURS .”
On the label for Vancomycin Hydrochloride · DailyMed
“Discard reconstituted and diluted solutions 14 days after initial reconstitution.”
On the label for Vancomycin Hydrochloride · DailyMed
“Discard the reconstituted solution of vancomycin hydrochloride after 14 days, or if it appears hazy or contains particulates.”
On the label for Vancomycin Hydrochloride for Oral Solution · DailyMed
“Discard reconstituted solutions of vancomycin hydrochloride after 14 days, or if it appears hazy or contains particulates.”
On the label for Vancomycin Hydrochloride for Oral Solution · DailyMed
“Discard the reconstituted solution of FIRVANQ after 14 days, or if it appears hazy or contains particulates.”
On the label for FIRVANQ · DailyMed
“Discard reconstituted solutions of FIRVANQ after 14 days, or if it appears hazy or contains particulates.”
On the label for FIRVANQ · DailyMed
“Product should be used within 28 days of removal from aluminum overpouch.”
On the label for Vancomycin · DailyMed
“The solution in the flexible bag remains chemically stable for 28 days at room temperature (up to 25°C/77°F) after removal from the aluminum overpouch.”
On the label for Vancomycin · DailyMed
“Use within 28 days of removal from aluminum overpouch.”
On the label for TYZAVAN · DailyMed
“The solution in the flexible bag remains chemically stable for 28 days at room temperature (15°C - 25°C (59°F – 77ºF)) after removal from the aluminum overpouch.”
On the label for TYZAVAN · DailyMed
How the label says to keep vancomycin
Storage is the other half of the question: the stability behind any date assumes these conditions, and a medicine kept outside them ages faster than the calendar says.
- “Conditions Prior to reconstitution, store at 20° to 25°C (68° to 77°F).”
- “Store at 20° to 25°C (68° to 77°F).”
- “Prior to reconstitution, store at 20°C to 25°C (68°F to 77°F); excursions permitted to 15°C to 30°C (59°F to 86°F).”
- “Store at 20° to 25°C (68° to 77°F) [see USP Controlled Room Temperature].”
- “Conditions Prior to reconstitution, store dry powder at 20º to 25°C (68º to 77°F).”
- “5g/vial Prior to reconstitution, store at 20 to 25°C (68 to 77°F).”
Frequently asked questions
Does vancomycin expire?
Two different clocks apply and only one of them is the printed date. The date on a sealed pack is the manufacturer's guarantee for the unopened product. Once it is opened, mixed or diluted, the label imposes its own limit — as tight as 4 hours on some vancomycin products, and that is the number quoted on this page.
Can I still use vancomycin after the date on the box?
This page cannot tell you that, and nor can any page. The FDA's own shelf-life programme found 88% of tested lots stayed within specification at least a year past expiry — and concluded in the same breath that lot-to-lot variation means this can only be confirmed by testing each lot. What you can check at home is the in-use limit above and whether the product has been stored as the label requires. Ask a pharmacist about a specific pack; they will also dispose of what you no longer need.
Why do different vancomycin products have different limits?
Because they are different formulations. A suspension that gets mixed with water, a pen that gets carried at room temperature, and a sealed tablet do not behave alike, so each manufacturer's label sets its own limit and each is shown here with the product it belongs to. We never merge them into one number for the molecule.
More on vancomycin
Quoted from FDA labels for reference, not medical advice, and not a suggestion to use anything past its limit. If you are unsure whether a pack is still good, a pharmacist can tell you and can dispose of it safely.