Does granisetron expire?
The printed date covers the sealed pack. Once granisetron is opened, mixed or diluted, its label sets a second and usually much shorter limit — quoted below, per product.
Shortest limit on any granisetron label: 24 hours
“However, granisetron hydrochloride injection, has been shown to be stable for at least 24 hours when diluted in 0.”
That applies to the product it is printed on, not to every form of granisetron — check which one you have against the list below.
What the labels say
“However, granisetron hydrochloride injection, has been shown to be stable for at least 24 hours when diluted in 0.”
On the label for Granisetron Hydrochloride · DailyMed
“However, granisetron hydrochloride injection has been shown to be stable for at least 24 hours when diluted in 0.”
On the label for Granisetron Hydrochloride · DailyMed
“However, Granisetron Hydrochloride Injection has been shown to be stable for at least 24 hours when diluted in 0.”
On the label for Granisetron Hydrochloride · DailyMed
“Once the multiple-dose vial is penetrated, its contents should be used within 30 days.”
On the label for Granisetron Hydrochloride · DailyMed
“Discard Unused Portion 30 days after vial penetration Do not freeze.”
On the label for Granisetron Hydrochloride · DailyMed
“Once the multiple dose vial is penetrated, its contents should be used within 30 days.”
On the label for Granisetron Hydrochloride · DailyMed
How the label says to keep granisetron
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 at 20° to 25°C (68° to 77°F); excursions permitted to 15° to 30°C (59° to 86°F).”
- “Protect from light.”
- “Store between 20° and 25°C (68° and 77°F).”
- “Store at 20°-25°C (68°-77°F); excursions permitted between 15°-30°C (59°-86°F).”
- “16 HOW SUPPLIED/STORAGE AND HANDLING Granisetron hydrochloride injection USP, 1 mg/mL (free base), is supplied in 1 mL Single-Dose Vials and 4 mg/4 mL Multiple-Dose Vials.”
- “Store at 20° to 25°C (68° to 77°F) [see USP Controlled Room Temperature].”
- “16 HOW SUPPLIED/STORAGE AND HANDLING Granisetron Hydrochloride Injection, USP is supplied as follows: NDC Granisetron Hydrochloride Injection, USP Package Factor 67457-861-01 0.”
- “Store at 20° to 25°C (68° to 77°F); excursions permitted between 15° to 30°C (59° to 86°F).”
Frequently asked questions
Does granisetron 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 24 hours on some granisetron products, and that is the number quoted on this page.
Can I still use granisetron 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 granisetron 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 granisetron
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.