Botox Storage: Temperature, Shelf Life After Opening and Time Out of the Fridge

Quick answer: According to the Health Canada product monograph for BOTOX Cosmetic, unopened (vacuum-dried) product is stored in a refrigerator at 2 to 8 °C or in a freezer at or below −5 °C. After reconstitution it is kept at 2 to 8 °C, must not be frozen, and is administered within 24 hours [1]. The monograph gives no time allowance outside refrigeration, so a vial left out of the fridge counts as a temperature excursion: set it aside, record the details and contact the manufacturer before using it [1][3]. Some studies report preserved sterility and effect after longer storage, but that goes beyond the labelling [2].

Storage is part of safe injecting. The monograph states that safe and effective use depends on proper storage, correct dosing, and proper reconstitution and administration, and it lists inappropriate storage or reconstitution among the reasons a patient may respond poorly [1]. This guide answers the questions injectors ask most: what the correct Botox storage temperature is, how long Botox can be out of the fridge, and how long it lasts after opening.

Botox storage at a glance

The table summarizes the Health Canada monograph for BOTOX Cosmetic (revised February 2025) [1]. Other botulinum toxins have their own monographs.

How long can Botox be out of the fridge?

The monograph does not give a time limit outside refrigeration. It specifies a refrigerator or freezer for the unopened product and a refrigerator for the reconstituted product, so there is no label-supported “safe” time at room temperature [1].

Published work shows that warm storage does not always destroy reconstituted onabotulinumtoxinA in controlled settings. In a 2025 study in the Journal of Cosmetic Dermatology, vials reconstituted and kept at 37 °C for up to 60 days showed no microbial growth on sterility testing. In a randomized trial of 60 patients, toxin that had been stored for 7 days at 37 °C after reconstitution still reduced glabellar line severity and muscle activity, as freshly reconstituted toxin did [2]. The authors stress that the sterility work was done in a laboratory, that real clinics may differ, and that larger multicentre studies are needed [2]. One study does not set a safe window for routine practice.

What to do after a temperature excursion

Treat any time outside the labelled storage as an excursion and do not improvise. A sensible clinic procedure is:

1. Set the vial aside and mark it so it is not used by mistake.
2. Record the product, lot number, estimated time out of storage, the temperature if known, and who found it.
3. Contact the manufacturer’s medical information service (contact details are in the monograph) and ask for stability data for your situation.
4. Let your medical director decide whether to use or discard the product, and document the decision.

This mirrors clinical-trial practice. A trial protocol for a botulinum toxin product requires that any temperature deviation leads to quarantine of the product and immediate contact with the sponsor [3].

Botox shelf life after opening

Once reconstituted, the label says to administer BOTOX Cosmetic within 24 hours, keep it at 2 to 8 °C, and never freeze it [1]. Because the product has no preservative, a vial is for a single patient [1].

Some literature goes further. The 2025 study summarizes a 2015 expert consensus statement that refrigerated or frozen reconstituted neuromodulators can be stored for up to 4 weeks without significant risk of contamination or loss of efficacy, and cites studies that found preserved effect after 6 weeks or more of refrigerated or frozen storage [2]. These are off-label practices, and freezing reconstituted product conflicts with the monograph. A clinic that chooses them needs a written protocol approved by its medical director.

Storage routine for your clinic

• Keep toxin in a dedicated refrigerator with a calibrated minimum–maximum thermometer and a temperature log. Botulinum toxin clinical-trial protocols require this [3].
• Write the date and time of reconstitution on the vial label [1].
• Check the expiry date on the vial and the box every time you use a vial [1].
• Dispose of used and expired vials as medical waste. For spills, the monograph recommends dilute hypochlorite (0.5% or 1%) for five minutes before disposal [1].
• If a patient responds poorly, review storage and reconstitution as possible causes alongside dose, muscle selection and antibodies [1]. Our guide to botulinum toxin resistance covers the rest.

To learn safe handling and reconstitution in a structured way, see CBAM’s online injectables program.

Other toxins and dermal fillers

Storage rules differ by product. The 2025 study notes that newer formulations such as Xeomin and Daxxify removed the need for cold-chain storage before reconstitution and are stable at up to 25 °C for up to 36 months, and that most manufacturers advise using reconstituted toxin within 24 to 72 hours [2]. Always follow the monograph of the product in your hand.

Dermal fillers are medical devices with product-specific instructions for use. Store each product as its instructions state, check the expiry date on the box, and discard expired syringes. For approvals by treatment area, see body filler injection areas.

Botox storage FAQ

What is the correct Botox storage temperature?

The Health Canada monograph for BOTOX Cosmetic says to store unopened product in a refrigerator at 2 to 8 °C or in a freezer at or below −5 °C, and reconstituted product in a refrigerator at 2 to 8 °C [1].

How long can Botox be out of the fridge?

The monograph gives no allowed time outside refrigeration. Treat it as a temperature excursion, set the vial aside and contact the manufacturer before use [1][3].

What is the Botox shelf life after opening?

The label says to administer reconstituted BOTOX Cosmetic within 24 hours while stored at 2 to 8 °C [1]. Longer storage is off-label and based on limited studies and consensus statements [2].

Can you freeze Botox?

Unopened vacuum-dried product may be stored in a freezer at or below −5 °C, but reconstituted product must not be frozen [1].

What counts as a Botox temperature excursion?

Any time outside the storage conditions on the label, for example a fridge failure or a vial left out after a clinic day. Quarantine the product, document the details and ask the manufacturer for guidance [1][3].

Can one vial be used for several patients?

The monograph does not recommend it, because the product and diluent contain no preservative [1].

Related reading

• Understanding and Managing Botulinum Toxin Resistance
• Botox Aftercare and 7 Things You Should Know
• How to Treat the Glabellar Frown Lines Using Botox

References

1. AbbVie Corporation. BOTOX COSMETIC (onabotulinumtoxinA for injection) product monograph, revised 20 February 2025 (Health Canada). pdf.hres.ca
2. Rodriguez RYDSB, De La Torre Canales G, Giracca CN, et al. Is cold storage still a must? Evaluating room-temperature onabotulinumtoxinA for glabellar lines treatment. J Cosmet Dermatol 2025;24(11):e70554. PMC12626392
3. ClinicalTrials.gov. Botulinum toxin treatment of glabellar lines: efficacy and safety study I (NCT02677298), study protocol, section on investigational product. clinicaltrials.gov

Updated October 2026. This article is educational. Product storage rules differ by brand and country; follow the product monograph and your clinic protocol.

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