UK pharmacist warns freezing can ruin weight loss injections; keep them between 2°C and 8°C.

A UK pharmacist warns that freezing temperatures can damage weight loss injections like Mounjaro and Wegovy, which are sensitive protein-based drugs. With about 2.5 million people using them in the UK, proper storage is critical—medications must be kept between 2°C and 8°C, and discarded if frozen, even if thawed. Travelers should keep pens in carry-on luggage and use insulated cases to avoid cold exposure. The liquid should be clear and colorless before use; any cloudiness or particles mean it should not be used. Staying hydrated is advised, as nausea from the drugs can worsen during travel.