Does bimatoprost expire?
The printed date covers the sealed pack. Once bimatoprost is opened, mixed or diluted, its label sets a second and usually much shorter limit — quoted below, per product.
Shortest limit on any bimatoprost label: 14 days
“Discard any unused containers 14 days after first opening the pouch.”
That applies to the product it is printed on, not to every form of bimatoprost — check which one you have against the list below.
What the labels say
“Discard any unused containers 14 days after first opening the pouch.”
On the label for ZOLYMBUS · DailyMed
How the label says to keep bimatoprost
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 Bimatoprost ophthalmic solution 0.”
- “Store at 2°C to 25°C (36°F to 77°F).”
- “16 HOW SUPPLIED/STORAGE AND HANDLING Bimatoprost ophthalmic solution, 0.”
- “Store at 2° to 25°C (36° to 77°F).”
- “Store bimatoprost ophthalmic solution 0.”
- “16 HOW SUPPLIED/STORAGE AND HANDLING LATISSE ® (bimatoprost ophthalmic solution) 0.”
- “Store at 2º to 25ºC (36º to 77ºF).”
- “Store refrigerated at 2°C to 8°C (36°F to 46°F).”
Frequently asked questions
Does bimatoprost 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 14 days on some bimatoprost products, and that is the number quoted on this page.
Can I still use bimatoprost 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 bimatoprost 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 bimatoprost
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.