GLP-1 storage and travel — UK patient guide

Refrigeration — before first use

All licensed UK GLP-1 injectables are stored in a refrigerator between 2°C and 8°C before first use. Don’t freeze. Don’t leave on a windowsill or in direct heat. Keep in the original carton to protect from light.

Use a fridge thermometer if your fridge runs cold (some domestic fridges hit 0°C on the bottom shelf, which can freeze pens). The middle shelf of the door, or a middle shelf away from the back wall, is usually safest.

In-use limits — once you start the pen

Once you start using a pen, you can keep it at room temperature (typically up to 30°C) for a defined window. The window varies by product:

These are the manufacturer-stated tolerances at the time of writing. Always confirm in your PIL — they are subject to manufacturer updates and there are product-strength-specific variations.

What “in use” means

For pen products, “in use” starts the first time the pen needle goes through the seal. From that point the in-use timer runs.

Many patients record the “first use” date on the pen label or carton — useful when you have multiple pens mid-rotation or when titrating between strengths.

Travel — short trips

Cabin baggage, not hold

Carry your pens in cabin baggage. Hold luggage can be exposed to sub-zero temperatures at altitude, which freezes the product. Once frozen, the pen must be discarded — don’t inject thawed product.

Airport security

Pens, needles, and (for in-use windows ≥21 days) sharps bins are allowed in cabin baggage as medication. Carry:

• The medicine in its original carton with the PIL.
• A copy of your prescription (paper or digital).
• A pharmacist note if you have one (useful at non-UK security checkpoints).

Declare at security if asked. Most UK and EU security staff recognise GLP-1 pens; for travel to less familiar destinations (some Middle Eastern, African, or Asian countries) check the destination embassy guidance before you fly.

Insulin coolers

For trips longer than a couple of hours where in-use temp might exceed 30°C, a small insulin cooler (Frio, Medisana, MedAngel, etc.) keeps medication at safe temperatures without needing a fridge. Two common models:

• Evaporative coolers (Frio) — soak in water, no electricity needed, keep at room temp not fridge temp. Good for travel, not for fridge replacement.
• Battery-powered mini-fridges (MedAngel, various Amazon models) — keep at fridge temp. Heavier, need charging.

Travel — longer trips or holidays

• Pack enough supply for the trip plus a buffer (one extra pen per week of travel).
• Ask your prescriber for an early renewal if needed — they can sometimes prescribe a few weeks early for documented travel.
• Take a pharmacy receipt or prescription copy in case customs queries the supply.
• For destinations with extreme heat (Middle East, tropical Asia), confirm hotel-room fridge access before relying on an evaporative cooler alone.

Cold-chain failures

If the pen was frozen

Don’t use it. Frozen GLP-1 product loses potency and can’t be safely re-warmed. Contact your dispensing pharmacy for replacement. Report via Yellow Card if the failure happened in supply chain (e.g. pharmacy fridge failure).

If the pen went above 30°C briefly

For an in-use pen, brief excursions above 30°C (a hot day where the pen was on the table) usually don’t require discarding if the pen has been returned to spec range promptly. Confirm with your PIL — some products have a specific allowance, others don’t.

For a pre-first-use pen, the answer is more conservative — contact your dispensing pharmacy.

If the pen looks different

Discolored solution, particulates, or anything that doesn’t look like the original — don’t use. See what to do if your pen looks wrong.

Running out abroad

1. Contact your UK prescriber first. Some private prescribers can post a replacement to a hotel; NHS prescribers may be able to arrange an emergency supply for collection on return.
2. If you must source abroad, only use a pharmacy you can verify against the local national register (e.g. ANSM in France, AEMPS in Spain, AIFA in Italy, FDA in the US).
3. Don’t buy from non-pharmacy sources. Counterfeit GLP-1s in tourist-heavy markets are well-documented. The same patterns the MHRA flags in the UK appear in EU and US enforcement.
4. Don’t bulk-buy abroad to bring home. UK personal-import rules are narrow for POMs and customs can seize. See importing peptides into the UK.

Disposal

Used pens and needles go into a sharps bin. Your UK pharmacy will provide one and accept used bins for safe disposal. Don’t put used pens in household waste.