The basic requirement
GLP-1 injectables are generally stored refrigerated, between about 36°F and 46°F (2°C to 8°C), in the original carton to protect them from light.
Do not freeze them. Freezing damages the protein, and a product that has been frozen should be discarded even if it looks normal after thawing. Do not store them against the back wall of a fridge or next to the cooling element, where freezing is most likely.
Room temperature tolerance
Both product families permit a period at room temperature, which is what makes travel and the occasional forgotten pen survivable. The permitted duration and temperature ceiling differ by product and have been revised over time.
Because those windows differ and change, do not rely on a figure from an article — including this one. Read the storage section of the leaflet in the box you actually received, or ask the dispensing pharmacist. If a pen has been out longer than its permitted window, it should be discarded rather than used.
When the package arrives
Open it promptly and check it properly, ideally on the day it arrives. What you are looking for:
- Are the cold packs still cold, and is the product cool to the touch?
- Is there a temperature indicator in the box, and has it been triggered?
- Is the liquid clear and colourless to slightly yellow, without particles?
- Is the expiry date reasonable, given you will be using this over weeks?
- Is the packaging intact and the seal unbroken?
If something is wrong
Photograph everything before you do anything else — the outer box, the cold packs, any temperature indicator, and the product itself. Then contact the pharmacy or provider the same day.
Do not inject a product you believe has been temperature-compromised on the assumption it is probably fine. A wasted month of medication is an expensive annoyance. An injection of degraded protein is a different category of problem.
Providers vary enormously in how they handle this, and how a company responds to a heat-damaged shipment tells you a great deal about what happens when something more serious goes wrong.
Delivery logistics that matter
Cold-chain shipments are usually timed to avoid sitting over a weekend. If you will be away, most providers can delay a shipment — but you need to tell them before it dispatches.
A package left on a doorstep in summer heat for eight hours has spent that time outside its storage range. If you cannot reliably receive deliveries, ask about signature requirements, hold-at-location options, or shipping to a workplace.
Travelling
Carry injectables in hand luggage rather than checked baggage. Cargo holds can drop below freezing, and a separated bag takes your medication with it.
Keep the product in its original labelled carton, which is what makes the prescription obvious at security. Ask your provider for a letter if you are crossing borders. Use an insulated case with a cool pack rather than loose ice, and remember that needles and sharps have their own airline and destination rules.
Disposal
Used pens and needles go in a proper sharps container, not the household bin. Many pharmacies accept sharps returns, and most areas have a household hazardous waste route.
Ask your provider whether they supply a sharps container. Some do, most do not, and it is a small recurring cost that rarely appears in any price comparison.