Buying weight loss medicine online: the UK rules
A registered online pharmacy can supply weight loss medicine after a proper consultation. The pharmacy regulator tightened the rules in February 2025.
A UK online pharmacy must verify your weight, height or BMI through an independent route before supplying weight loss medicine. A questionnaire alone is not enough. Accepted routes are a video consultation, an in person check, your clinical records or contact with another healthcare provider.
What the pharmacy must do
- Verify independently. The prescriber checks your weight, height or BMI through a video consultation, in person, from your clinical records or by contacting another healthcare provider. Source: GPhC.
- Check who you are. The service should have robust identity checks, so medicines reach the right person. Source: GPhC.
- Share with your GP, with consent. The prescriber should share relevant prescription information with your regular prescriber once you agree. Source: GPhC.
- Follow up. The service needs a way to check how your weight loss is progressing. Source: GPhC.
- Put safety before sales. Owners should check whether incentives or targets compromise patient safety. Source: GPhC.
What is not enough
- A questionnaire alone.
- A phone call to confirm your measurements.
- A photo or a recorded video on its own for a first supply. Photos may be used for later supplies once the first weight was verified another way.
Source: GPhC. The full rules sit in the GPhC GPhC guidance for online pharmacies.
What you should expect from a safe service
The GPhC reviewed inspections and 1,307 concerns from January 2024 to December 2025. Prescribing practice made up 27 per cent of concerns, including weak BMI checks. The regulator says patients should expect:
- Each supply reviewed on its own merits.
- Independent checks of BMI and medical history.
- Clear records, including refusals and the reasons.
- Follow up, with clinical questions answered by trained staff.
- Clear contact details and a way to complain.
- Prescribers registered in the UK.
- Delivery in line with storage rules, with tamper evident or temperature controlled packaging.
Source: GPhC.
Check the registration
Check the pharmacy on the GPhC in Great Britain, or with the Pharmaceutical Society of Northern Ireland. Source: MHRA. GLP Index shows the registration number on every pharmacy page, and the pharmacy check guide lists the steps.
Fakes and unsafe sellers
- Do not buy from beauty salons, social media or any seller without a consultation first.
- Genuine products are pre-filled pens or tablets. Powder vials which need mixing are unauthorised and dangerous.
- Counterfeit pens can look close to the real thing. Buy only from a registered pharmacy with a valid prescription.
Source: MHRA. Read also the GPhC advice on GPhC.
Report a problem
Report a side effect or a suspected fake to the MHRA through the Yellow Card scheme.
Questions
Can I get weight loss medicine from an online questionnaire alone?
No. The GPhC says a prescriber should not decide on the information in a questionnaire alone. Weight, height or BMI must be verified through an independent route.
How will an online pharmacy verify my BMI?
Through a video consultation, in person, from your clinical records or by contacting another healthcare provider such as your GP. A phone call, or a photo on its own, is not appropriate.
Will the pharmacy tell my GP?
The prescriber should share relevant information with your regular prescriber, with your consent. Without consent the prescriber must decide whether a supply is safe.
How do I know a pen is genuine?
Buy only from a registered pharmacy with a valid prescription. Genuine products are pre-filled pens or tablets. The MHRA says powder vials which need mixing are unauthorised and dangerous.
How do I report a fake or a problem?
Report a suspected fake or a side effect to the MHRA through the Yellow Card scheme. Raise a concern about a pharmacy with the GPhC.
Official sources
Every rule on this page comes from the sources below. GLP Index checked each one on 8 October 2026.
- General Pharmaceutical Council. Providing weight management services: FAQs. Checked 8 October 2026.
- General Pharmaceutical Council. Guidance for registered pharmacies providing pharmacy services at a distance, including on the internet. February 2025.
- General Pharmaceutical Council. Weight management medicines and services: a review of GPhC inspections and concerns. April 2026.
- General Pharmaceutical Council. GPhC registers. Live register.
- Medicines and Healthcare products Regulatory Agency. GLP-1 medicines for weight loss and diabetes: what you need to know. First published 5 June 2025, updated 5 February 2026.
- General Pharmaceutical Council. Buying medicines safely online. Checked 8 October 2026.
- Medicines and Healthcare products Regulatory Agency. Yellow Card scheme: report a side effect or a fake medicine. Live service.
More on UK rules
- GLP-1 medicines in the UK: which are licensed for weight loss
- Who can get weight loss medicine in the UK
- Weight loss injections on the NHS: who qualifies and when
- MHRA safety advice for weight loss medicines
- Why weight loss medicines are not advertised in the UK
- Who regulates weight loss medicines in the UK
- UK weight loss medicine timeline: every key decision
- NHS vs private: what weight loss medicine costs in the UK
- All UK rules pages