Mounjaro Delivery & Storage UK:
Temperature Rules, Safety Checks & What to Do

Mounjaro must be kept refrigerated at:

• Store in a refrigerator — not in the door, which can experience temperature fluctuations
• Keep in the original packaging and away from direct light
• Do not freeze — freezing permanently damages the formulation
• Once removed from the fridge, refer to the patient information leaflet for room temperature time limits

These requirements apply throughout the entire supply chain from the manufacturer, to the pharmacy, through delivery, and into your home. Failure at any point can compromise medication safety and effectiveness.

A proper cold chain delivery from a GPhC registered pharmacy should include:

• Insulated packaging — typically a polystyrene box or specialist insulated bag
• Ice packs or gel packs — to maintain temperature during transit
• Cool temperature on arrival — the packaging and medication should feel cold when opened

The packaging should also be sealed, tamper evident, and include your prescription details and patient information leaflet. If any of these elements are absent, contact the pharmacy before using the medication.

Temperature excursions during delivery are rare when using a compliant pharmacy, but they do occur. The Mounjaro SmPC provides clear guidance on what to do:

If the medication has been exposed to temperatures above 30°C, do not use it. Contact your pharmacy to report the issue and request a replacement. Keep the packaging as evidence of the temperature breach.

Be cautious if your delivery shows any of the following signs of inadequate cold chain handling:

• No insulation — the package is a standard cardboard box or envelope with no thermal lining.
• Warm packaging on arrival — the contents should feel cold, not room temperature.
• Melted or absent ice packs — indicates the cold-chain may have failed during transit.
• Poor or absent packaging — if the pen is not in its original box, or the patient information leaflet is missing, contact the pharmacy before use.
• No GPhC registration displayed — legitimate pharmacies are legally required to show their registration. Verify at the GPhC register.

These warning signs are also indicators of an unregistered or unverified supplier. Our pharmacy verification guide explains the checks that distinguish compliant providers from unsafe ones. All pharmacies listed on Health Wise are verified against these standards before listing.