Do you have to store Wegovy in the fridge?

What the official guidance actually says about refrigeration

The Wegovy SmPC, held on the eMC, is unambiguous on one point: before first use, every pen must live in the fridge between 2°C and 8°C. Freezing ruins the solution. If a pen has ever frozen (even briefly) it should not be used, and you should contact your prescriber or pharmacy before taking another dose.

After you have started a pen, the rules change slightly. Room-temperature storage becomes permitted for a defined window, at no more than 30°C. The catch is that the exact number of days is stated in your specific Patient Information Leaflet, and it is that document (not a web page) that carries legal weight. The NHS semaglutide medicines page echoes this, advising patients to check their leaflet carefully rather than relying on general advice online. If you have lost or not yet read your leaflet, your pharmacist can print a fresh copy.

One rule applies throughout: never put a used or unused pen back into the freezer compartment. Temperature cycling damages the medicine even if the pen looks unchanged.

Travelling with Wegovy, keeping it cool without the fridge

A question our prescribers hear most weeks is what to do with a Wegovy pen during a holiday or long commute. Short answer: a cool bag with an ice pack works, provided the ice pack does not touch the pen directly (which risks freezing). Insulated medication wallets designed for insulin are widely available and sized for GLP-1 pens.

For longer trips (flights included) carry the pen in your hand luggage rather than the hold, where temperatures are uncontrolled. Most airlines will allow it alongside a letter from your prescriber. If you are travelling for longer than the room-temperature window in your leaflet allows, plan access to a fridge at your destination: hotels, self-catering accommodation and some airport lounges can help. The Wegovy treatment overview at nume has further practical detail on managing your treatment day to day.

If you are unsure whether a pen has been too warm for too long, err on the side of caution and speak to your prescriber before injecting. A spoiled pen may not look different but could be less effective or, in worst cases, contaminated.

What happens if storage goes wrong, and when to act

Wegovy that has been frozen, left above 30°C for longer than permitted, or kept at room temperature beyond the leaflet's window should not be used. Using degraded medicine risks reduced effectiveness, not just wasted money. This is one of several reasons why buying semaglutide from unverified online sellers is dangerous: you have no certainty over how the pens were stored between manufacturer and doorstep.

Legitimate supply matters. The MHRA has warned publicly about counterfeit and illegally traded GLP-1 pens, some seized batches contained entirely different substances. If you have questions about the source of your medication, or you have experienced any unexpected side effect after an injection, you can report it via the MHRA Yellow Card scheme. For people considering starting treatment through a regulated route, our free consultation page explains how the clinical assessment and prescription process works.

On a related practical note: used needles must be disposed of in an approved sharps container, never in the household bin. Proper disposal protects everyone in the house and is required by law.

Wegovy tablets versus the injection: storage is very different

The Wegovy tablet (oral semaglutide, approved by the MHRA in June 2026 as the first oral GLP-1 medicine for weight management in the UK) does not require refrigeration at all. Room-temperature storage makes it considerably more travel-friendly than the injection. If the cold-chain requirement of the injection is a practical problem for your lifestyle, this is worth raising at your consultation, your prescriber can discuss whether the tablet is clinically appropriate for you.

The injection and the tablet use the same active ingredient but behave differently in the body: the tablet must be taken first thing in the morning on an empty stomach, waiting at least 30 minutes before food, drink or other medicines. Those are different trade-offs from the weekly injection schedule. You can read more about the differences in the weight-loss treatment options overview. For questions about needle handling during injections, our guide on reusing Wegovy needles covers what the guidance says there too. And if you want to understand how Wegovy compares with other injectable options available in the UK, the weight-loss injections page gives a clear run-through.

Getting the storage right is not a small detail, it is part of using the medicine safely. Patients new to the treatment often ask whether you have to put Wegovy in the fridge, and the answer depends on whether the pen has been opened yet, a distinction worth understanding before you start. A closely related question, whether Wegovy has to be stored in the fridge at all times, is one our pharmacists explain regularly because the rules for in-use pens differ from those for unopened stock. If you are still uncertain, our page on how to store Wegovy in the fridge correctly walks through the practical steps in plain language. If in doubt, contact your prescriber or pharmacist before your next dose.