Help when you need it, and medicine you can trust
When to get help
Get urgent help
Stop your treatment and seek urgent medical help if you experience: severe, persistent stomach pain, especially spreading to your back, with or without vomiting. This can be a sign of pancreatitis. Sudden pain in the upper right of your tummy, fever, or yellowing of the skin or eyes: possible gallbladder problems. Sudden loss of vision, or loss of part of your field of vision: seek same-day eye assessment. Swelling of the face or lips, difficulty breathing, or a widespread rash: call 999.
Get advice promptly
Seek advice promptly if you notice: signs of dehydration during vomiting or diarrhoea (dizziness, reduced urination, dry mouth): keep sipping fluids, as dehydration can affect your kidneys; palpitations or a racing heartbeat at rest; a new neck lump, swelling, or hoarseness. If you have type 2 diabetes and use insulin or a sulfonylurea, know the signs of low blood sugar (sweating, shaking, sudden hunger, confusion) and treat promptly.
Usually settles
Side effects, how common they are and how to manage them are on each treatment page.
Before an operation
Before any operation: tell your surgical or anaesthetic team you take a GLP-1 medicine. It slows stomach emptying, which matters for anaesthesia.
Genuine medicines
- Every medicine we supply is bought from its manufacturer or a UK-licensed wholesaler.
- Check the name, strength and batch number on the box or pen against the label we print.
- If a pen looks damaged or doesn't work, don't use it and don't try to get the medicine out. Keep it, message us and report it on the Yellow Card site.
- Genuine weight-loss medicines come as pre-filled pens or tablets. Powder in a vial that you mix yourself is never an authorised product.
- Never buy from social media, a salon, or anyone who doesn't ask about your health first. If you're offered one without a prescription, walk away.
- Retatrutide is not licensed or available in the UK. Read our retatrutide guide
Sources: MHRA, GLP-1 medicines for weight loss and diabetes: what you need to know (5 Feb 2026); MHRA, fake Mounjaro KwikPen 15 mg notice (24 Feb 2026); MHRA, No summer shortcut (24 Jul 2026).
Official leaflets
The leaflet in your parcel is the maker's own. The same leaflets are on the electronic medicines compendium (emc), kept up to date by the makers.
- Mounjaro KwikPenLeaflet last revised August 2026Read on emc
- Wegovy FlexTouch pens, 0.25 mg to 2.4 mgLeaflet last revised 08/2026Read on emc
- Wegovy 7.2 mg single-dose pens, pack of fourLeaflet last revised 08/2026Read on emc
- Wegovy tabletsLeaflet last revised 06/2026Read on emc

- Foundayo tabletsLeaflet last revised August 2026Read on emc

Report a problem
Report a suspected side effect, or a medicine you think may not be genuine, on the MHRA Yellow Card website or app.
▼ means a medicine is under additional monitoring, so new safety information can be found quickly. You can help by reporting any side effect.
Please tell us too, so your pharmacist can review your treatment.
How we check every order
- A pharmacist reviews every consultation
- Photo ID and a weigh-in on a short video call before a first supply of a prescription weight-loss medicine
- A short health check before each reorder
- A GPhC-registered pharmacy (9013213) with a superintendent pharmacist (2232652): check the register
- Your data is protected: ICO registration ZC052365
- Pens travel by Royal Mail Tracked 24 in insulated packaging
Checking any online pharmacy
The GPhC and other UK health organisations give six tips:
- 1
Check if the online healthcare service and healthcare professionals working there are registered with UK regulators
- 2
Ask questions about how the service works
- 3
Answer questions honestly about your health and medical history
- 4
Find out your options for treatment and how to take any medicines you're prescribed
- 5
Expect to be asked for consent for information to be shared with other healthcare professionals involved in your care
- 6
Check what after-care you will receive
Source: GPhC, How to keep safe when getting medicines or treatment online. The EU common logo can't be shown by pharmacies in Great Britain since 1 January 2021, so it isn't a check any more.
Something doesn't feel right?
For urgent medical concerns, call NHS 111 or 999.


