Does cefepime expire?
The printed date covers the sealed pack. Once cefepime is opened, mixed or diluted, its label sets a second and usually much shorter limit — quoted below, per product.
Shortest limit on any cefepime label: 4 hours
“Discard any unused portion after 4 HOURS .”
That applies to the product it is printed on, not to every form of cefepime — check which one you have against the list below.
What the labels say
“Discard any unused portion after 4 HOURS .”
On the label for CEFEPIME · DailyMed
“The entire contents of the bag must be used within 4 hours from the time of initial entry.”
On the label for CEFEPIME · DailyMed
“Note: Following reconstitution (activation), product must be used within 12 hours if stored at room temperature or within 5 days if stored under refrigeration.”
On the label for CEFEPIME HYDROCHLORIDE AND DEXTROSE · DailyMed
“The thawed solution remains stable for 7 days under refrigeration 5°C (41°F) or 24 hours at room temperature 25°C (77°F).”
On the label for Cefepime · DailyMed
“When diluted according to the instructions above, cefepime is stable for 24 hours at room temperature 20°C to 25°C (68°F to 77°F) or 7 days in a refrigerator 2°C to 8°C (36°F to 46°F).”
On the label for CEFEPIME · DailyMed
“The product must then be used within 7 days, but not beyond the labeled expiration date.”
On the label for CEFEPIME HYDROCHLORIDE AND DEXTROSE · DailyMed
How the label says to keep cefepime
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.
- “16 HOW SUPPLIED/STORAGE AND HANDLING How Supplied Cefepime for injection, USP is supplied as follows: Cefepime for Injection, USP in the dry state, is a white to pale yellow powder.”
- “and Handling Cefepime for injection, USP in the dry state should be stored at 20 to 25°C (68 to 77°F) [see USP controlled room temperature.”
- “Store the unactivated unit at 20–25°C (68–77°F).”
- “As with other cephalosporins, reconstituted Cefepime for Injection USP and Dextrose Injection USP tends to darken depending on storage conditions, within the stated recommendations.”
- “To avoid inadvertent activation, the DUPLEX® Container should remain in the folded position until activation is intended.”
- “Protect from light after removal of foil strip.”
- “Diagram 1 Diagram 2 Reconstitution (Activation) Do not use directly after storage by refrigeration, allow the product to equilibrate to room temperature before patient use.”
- “16 HOW SUPPLIED/STORAGE AND HANDLING How Supplied Cefepime for Injection, USP is supplied as follows: Cefepime for Injection, USP in the dry state, is a white to pale yellow powder.”
Frequently asked questions
Does cefepime 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 cefepime products, and that is the number quoted on this page.
Can I still use cefepime 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 cefepime 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 cefepime
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.