Does topotecan expire?
The printed date covers the sealed pack. Once topotecan is opened, mixed or diluted, its label sets a second and usually much shorter limit — quoted below, per product.
Shortest limit on any topotecan label: 4 hours
“Topotecan Injection diluted for infusion is stable for 4 hours at room temperature or 24 hours at refrigerated temperature in ambient lighting conditions.”
That applies to the product it is printed on, not to every form of topotecan — check which one you have against the list below.
What the labels say
“Topotecan Injection diluted for infusion is stable for 4 hours at room temperature or 24 hours at refrigerated temperature in ambient lighting conditions.”
On the label for Topotecan · DailyMed
“Discard unused portion after 24 hours.”
On the label for Topotecan · DailyMed
“Discard after 24 hours.”
On the label for topotecan hydrochloride · DailyMed
“Studies have shown the product is stable for 28 days after initial puncture when stored at room temperature.”
On the label for Topotecan · DailyMed
How the label says to keep topotecan
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.
- “Store refrigerated between 2°C and 8°C (36°F and 46°F) in the original carton to protect from light.”
- “Store diluted Topotecan Injection at 20°C and 25°C (68°F and 77°F) in ambient lighting conditions for no more than 24 hours.”
- “Store between 20°C and 25°C (68°F and 77°F) [see USP Controlled Room Temperature] in original carton.”
- “Protect from light.”
- “Store reconstituted product diluted for infusion at approximately 20°C to 25°C (68°F to 77°F) protected from light for no more than 24 hours.”
- “Retain in carton to protect from light.”
Frequently asked questions
Does topotecan 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 topotecan products, and that is the number quoted on this page.
Can I still use topotecan 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 topotecan 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 topotecan
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.