Medicines and safety Posted or Updated on 1 Oct 2025

Patients who are using weight loss medications need to be aware that these may stop your contraception or HRT working as well. Please see the attached information for advice.

Some weight loss medicines (like GLP-1 treatments) can change how your body uses other medicines. This means your contraception (like the pill, patch, or implant) or HRT may not work as well.

It is very important to know this so you can stay safe and avoid unplanned problems.

You can find clear advice in these guides:

• Patient on GLP-1 and HRT please follow NHS guidelines and speak to your GP.

• Patients on GLP-1_Agonists and Contraception please review this link.

Please read the links above carefully and follow the guidance.