The pen is a multi-dose device containing several weekly doses at the same strength; the needle is single-use only and must be changed each injection. You don’t refill the pen, and you discard it when it’s empty or past the in-use window noted in the leaflet. Never share a pen with anyone else. Understanding the Wegovy pen design Wegovy (semaglutide) pens are pre-filled, multi-dose devices, meaning each contains several weekly doses of the same strength. NICE TA875, MHRA prod

No — do not use expired pens. Potency and sterility can’t be guaranteed after the expiry date, which risks reduced effect and unsafe...

Place used needles straight into a sharps container — never in household rubbish or recycling. Many pharmacies provide take-back schemes...