General guidance on keeping insulin and refrigerated medicines cool during a power outage, with a reminder to follow the label and your pharmacist.
- The label, pharmacist and provider decide what is safe, not a website.
- Keep medication cool but never frozen.
- Plan refills and a written storage card before an outage.
If you or someone you care for uses insulin or another refrigerated medicine, an outage can feel frightening. The most important point comes first: the label, the manufacturer's information, your pharmacist and your healthcare provider decide what is safe for your specific product. This page offers general planning ideas only and is not medical advice.
Make a plan with your pharmacist or provider before the next outage, not during it. Then see our broader guide to medical devices in a power outage.
Find out what your product allows
Different insulins and medicines have different storage rules. Many products state one rule for unopened supplies kept in the fridge and a different rule for a vial or pen currently in use at room temperature, and the allowed number of days varies by product. Do not rely on a general number from a website. Look at the package insert and label, or call your pharmacist, and write the answer on a card kept with your supplies.
Ask these questions in advance
- How long can an unopened vial or pen be kept outside the fridge, and at what temperature range?
- How long can the one in use be kept at room temperature?
- What should I do if it gets too warm or has been frozen?
- Who should I call if my supply is compromised, and what is the plan for an emergency refill?
Do not let it freeze
Insulin generally should not be frozen, and product guidance usually says to discard insulin that has frozen. Cooling it too aggressively is a real risk. Never place insulin directly against ice or a frozen gel pack, and never leave it in a cold car or outdoors in freezing weather. Check how the label describes freezing and heat exposure.
Cooler setup
- Choose a small insulated cooler or a purpose-made medication travel case.
- Freeze gel packs ahead of time and keep spare packs in the freezer.
- Wrap the medication in a cloth, towel or bubble wrap so it does not touch the pack directly.
- Add a thermometer if the label gives a temperature range, and check it regularly.
- Keep the cooler closed and shaded, and swap packs as they warm.
Fridge food guidance does not apply to medication. For the food side, see fridge and freezer food safety.
Keeping the fridge cold longer
A closed fridge stays cold for only a limited time, and opening the door lets cold air escape. Keep it shut as much as you can and group medication where you can reach it fast. A power station can run a small fridge or medication cooler (see how long a power station runs a fridge), but test it ahead of time and confirm the load with the unit's specifications.
Build your outage medication kit
- A printed list of medications, doses and prescribers
- Extra supplies: needles, test strips, alcohol swabs and a sharps container
- A glucose source such as tablets or juice, if appropriate for you
- Your pharmacy's phone number and an emergency refill plan
Ask your pharmacist whether an early refill is possible before a storm or an evacuation. Add the kit to your 72-hour checklist.
When to get help
If you have symptoms that worry you, such as confusion, extreme thirst or vomiting, seek medical help right away and call local emergency services if needed.
Other medicines to ask about
Insulin is not the only product that needs temperature care. Some injectable medications, eye drops, certain antibiotics in liquid form, biologic drugs, and some hormone or fertility treatments also have strict storage rules. Make a list of everything you take, ask the pharmacist which items are temperature sensitive, and write the guidance on a card. If you rely on a product for a serious condition, ask whether a backup supply or a different formulation is sensible. Never assume a product is fine or ruined without checking, because both mistakes can be costly.
Quick answers
How long can insulin stay out of the fridge?
It depends on the specific product and whether it is opened. Check the label or ask your pharmacist.
Can I put insulin directly on ice?
No. Frozen insulin is generally unsafe to use, so keep it wrapped and away from direct contact with ice packs.