How do you travel with medicine that needs refrigeration?

Plan the complete journey

Include the trip to the airport, security, flight, transfers, storage at your destination and possible delays. Check the permitted temperature and whether instructions change after first use. Ask how to monitor the conditions; a cooler or pack feeling cool does not prove the medicine stayed in range.

For examples of US instructions for specific products, see the semaglutide and tirzepatide guides. Not every form has the same storage needs.12

Screening and freezing

Check airport and airline rules for your particular cooling pack and device. Some medicine labels prohibit freezing. Direct contact with an ice pack can freeze a product even when it needs refrigeration. Follow the exact label and get product-specific advice on packing and monitoring.31

Do not count on an aircraft refrigerator

Airline facilities and rules differ. British Airways says it cannot keep passengers’ medicines cool and suggests discussing alternatives with a pharmacist. Delta says its aircraft galleys cannot refrigerate medicines and asks passengers to plan a personal cooling method that meets FAA requirements. These examples were checked on 4 November 2026; they do not describe every flight. Check the operating airline for each connection and plan for delays.56

If your cooler uses a battery

A powered cooler, spare battery and power bank may each have flight rules. For US passenger flights, the FAA says spare lithium batteries and power banks must be in carry-on baggage and protected from damage and short circuits. If a carry-on bag is checked at the gate, remove them and keep them in the cabin.

Battery size and device rules matter; an airline or another country may be stricter. Check the battery type and rating, device instructions and operating airline’s rules for every connection. Permission to carry a device does not prove it can run for the whole journey or keep the medicine in range.8

Dry ice is a separate aviation issue

Dry ice may expose a freeze-sensitive medicine to damaging cold. It does not replace checking the product’s temperature needs.

For US air travel, the FAA describes conditions for up to 2.5 kg of dry ice per package and passenger when packing perishables. These include airline approval and packaging that vents carbon dioxide. Checked baggage has marking requirements. These aviation rules are not a recommendation to use dry ice for medicine or a guarantee it will maintain the required temperature. Check the airline and authorities for your whole itinerary.71

If the temperature is uncertain

Record the product, known temperatures, time outside the labelled range and any freezing. Contact a pharmacist, care team or manufacturer for product-specific advice and a plan to continue treatment. A normal appearance cannot prove that a temperature-sensitive medicine remains effective.14