Weight Loss Medication From Your GP: What the NHS Can Prescribe (October 2026)

01 · The core answer

Will my GP prescribe weight loss medication?

Your GP can prescribe it if you meet the NHS criteria and your area has the service in place. Whether you qualify depends on the medicine, your BMI, your health conditions and where you live. Our guide on whether a GP can prescribe weight loss medication covers the wider picture.

The NHS position on Mounjaro is this: Mounjaro is available on the NHS, but access is being phased in over several years. NICE recommends it for adults with a BMI of at least 35 plus at least one weight-related condition, and the NHS primary-care rollout began in June 2025 with the highest-need groups first (initially BMI 40+ with four or more qualifying conditions). Full rollout is expected to take years, which is why many people who meet the licensed criteria choose regulated private treatment rather than waiting.⁴⁶

In practice, that means a GP may tell you that you are eligible in principle but not yet in the current rollout group. That is a statement about NHS capacity, not a judgement on whether you could benefit. The two situations are different, and it helps to ask which one applies to you.

02 · Your decision

NHS route or private route: which fits you?

The right route depends on where you sit in the NHS rollout and how soon you want to start.

The licensed criteria are wider than the NHS ones. Mounjaro is licensed for weight management in adults with a BMI of 30 or above, or a BMI between 27 and 30 with at least one weight-related condition such as high blood pressure, high cholesterol, obstructive sleep apnoea, cardiovascular disease, prediabetes or type 2 diabetes.¹¹¹

If you are weighing it up, our weight loss clinic page explains how we support patients. Your first 2.5mg pen on the Mounjaro pen page costs £129.99 as a first-order price with code FIRST40 (standard price £169.99), prices checked 10 October 2026.

03 · Who qualifies on the NHS

Who qualifies for Mounjaro on the NHS?

NHS eligibility is stricter than the licence and is released in stages. NICE recommends Mounjaro for adults with a BMI of at least 35 plus at least one weight-related condition.⁴ The primary-care rollout began in June 2025 with the highest-need groups first, initially BMI 40+ with four or more qualifying conditions.⁶

That means a person with a BMI of 35 and a single qualifying condition may be eligible on paper yet still be waiting for their group to open. Your practice or integrated care board can tell you where your area has reached.

Ethnic background changes the thresholds. People from South Asian, Chinese, other Asian, Middle Eastern, Black African or African-Caribbean backgrounds are at higher risk of weight- related health problems at a lower BMI, so clinical thresholds are usually reduced by 2.5 kg/m² for these groups.⁴ Mention your background to your GP if it applies to you.

Other medicines sit on different NHS pathways. NHS access to Wegovy runs through specialist weight-management services; ask your GP. Liraglutide is a daily injection supplied at 6mg/ml, unlike once-weekly Mounjaro and Wegovy.

04 · Preparing for the appointment

How to ask your GP about weight loss medication

Go in with a clear, factual picture and ask a direct question. Many people find the conversation easier when they have written things down first. Our guide on how to ask your GP for weight loss medication goes into more detail, and the page on getting weight loss medication from your GP covers what happens afterwards.

• Your recent weight and BMI, and how your weight has changed over time.
• Any weight-related conditions, such as high blood pressure, high cholesterol, sleep apnoea, prediabetes or type 2 diabetes.
• What you have already tried, including structured programmes and diet changes.
• Every medicine you take, including over-the-counter products.
• Your ethnic background, because it can adjust the BMI thresholds.

Then ask three plain questions. Do I meet the criteria? Is the service open in this area? If not yet, what other support can the practice offer now? The last question matters, because the NHS offers weight management programmes with regular support that do not depend on medication.

The medicines list is not a formality. Because Mounjaro slows stomach emptying, it can affect how quickly some oral medicines are absorbed, particularly when you start treatment or increase the dose. Tell your prescriber about everything you take, especially warfarin or other narrow-margin medicines, insulin, or sulfonylureas (where doses may need reducing to avoid low blood sugar). No adjustment is needed for paracetamol.¹¹³

05 · What GP-prescribed treatment involves

What is weight loss injection treatment like?

Mounjaro is the brand name for tirzepatide, a once-weekly injectable prescription medicine made by Eli Lilly. In the UK it is licensed for weight management in adults and for type 2 diabetes. It comes as a pre-filled multi-dose pen (KwikPen) in six strengths: 2.5mg, 5mg, 7.5mg, 10mg, 12.5mg and 15mg.¹

You build up gradually: everyone starts on 2.5mg once a week, and after at least 4 weeks the dose can step up, depending on how you respond.¹ Once a pen is in use, it can be kept out of the fridge at a temperature not above 30°C for up to 30 days after first use, and must then be thrown away; before first use, store it in the fridge until the printed expiry date.¹³

For people looking at injections specifically, see our guide to GP weight loss injections. For the prescribing side, see GP prescribed weight loss medication.

Treatment is not for everyone, and a prescriber will check. Side effects lead some people to stop. In SURMOUNT-1, 4.3% of people on 5mg, 7.1% on 10mg and 6.2% on 15mg stopped treatment because of side effects, compared with 2.6% on placebo.²

06 · How it works for appetite

How does it help with hunger?

It acts on gut hormones that regulate appetite. Tirzepatide is the first treatment of its kind to activate two natural gut-hormone receptors at once: GIP and GLP-1. Together these help regulate appetite, slow how quickly the stomach empties, and improve the way the body responds to insulin. In practice, most people feel fuller sooner and less hungry between meals, which supports a reduced-calorie diet.¹

No tablet or injection removes appetite by itself in a way that replaces eating habits. Treatment sits alongside a reduced-calorie diet and increased physical activity, and the licence says so.¹

Increased physical activity is part of the licence, not an optional extra. Nothing special is required: the evidence-backed pattern is regular moderate activity (such as brisk walking) plus resistance work for muscle. Start where you are and build; on injection days with early side effects, lighter movement still counts.¹

07 · Safety to raise with your GP

Who should not take Mounjaro?

It is not suitable for everyone, and your GP or prescriber will go through this with you. You should not take it if you are allergic to tirzepatide or any of its ingredients, and it should not be used during pregnancy or while trying to conceive.¹ Mounjaro must not be used during pregnancy, and it should be stopped at least one month before trying to conceive. If you become pregnant during treatment, stop the medicine and tell your prescriber promptly. Your prescriber will take extra care, or may recommend against treatment, if you have a history of pancreatitis, severe gut or digestive disease, diabetic retinopathy, or gallbladder problems. Always share your full medical history and medicine list during consultation.¹³

Thyroid history deserves a specific mention. In rodent studies tirzepatide caused thyroid C-cell tumours; it is not known whether this applies to humans, and no increase has been shown in human trials. As a precaution, tell your prescriber if you or a close relative have had medullary thyroid cancer or the inherited condition MEN 2. Routine thyroid monitoring is not required for most people.¹

Serious side effects are uncommon but need urgent attention. Seek immediate medical help for: severe, persistent stomach pain that may spread to your back, with or without vomiting (possible pancreatitis); pain in the upper right abdomen, fever or yellowing of skin/eyes (possible gallbladder problems); or signs of a severe allergic reaction such as swelling of the face or throat and difficulty breathing. If you notice a side effect, you can report it through the MHRA Yellow Card scheme.¹⁹

08 · If your GP says not yet

What if my GP says I do not qualify yet?

You have options, and none of them requires giving up. First, ask what NHS weight management support is available now, and when your group is expected to be reached. Second, ask about conditions linked to your weight, because managing blood pressure, cholesterol or blood sugar is worthwhile in its own right. Our article on diabetes medication and weight loss is useful if blood sugar is part of your picture.

Third, you can consider a regulated private prescriber. Weight loss medication without a GP is a legitimate route when it runs through a registered pharmacy and a proper prescriber consultation. Read more in weight loss injections without a GP.

At EverydayMeds, a GPhC-registered UK online pharmacy (GPhC 9012878), the free online consultation is a short health questionnaire with no obligation. It is reviewed by a GPhC-registered prescriber, not a scoring script. Payment is taken when you place the order; if the prescriber decides the treatment is not suitable, the order is refunded automatically in full. Delivery is free, next-day and tracked, in temperature-controlled packaging. Ongoing monthly reviews are included, and our Mounjaro comes through official LillyDirect supply.

Be wary of sellers who offer to supply without a consultation or prescription. Counterfeit and unregulated products are a real risk, and the MHRA publishes alerts about them.⁷ You can check our registration on the GPhC register.¹²

New customers save £40 on their first order with code FIRST40, and an automatic £25 reorder discount applies to every future order (code DOSE25).

09 · Stopping and cost-saving

Planning for stopping, and why not to stretch doses

Mounjaro manages weight; it does not cure the biology behind it. In SURMOUNT-4, people who stopped tirzepatide after 36 weeks regained on average 14% of body weight over the following year, while those who continued treatment lost a further 5.5% on average. Stopping should always be planned with your prescriber, with diet and activity habits ready to carry the load.¹⁴

Tirzepatide has a half-life of about five days, so after a final dose it takes roughly four to five weeks to clear the system. There is no way to speed this up, and nothing needs doing while it clears.¹

Cost pressure can tempt people to space injections out. Mounjaro is licensed as a once-weekly medicine; its blood levels are designed around a 7-day cycle.

Demand for these medicines is a live debate in the NHS, which we cover in unsustainable demand for weight loss medication.