If you are weighing up the Wegovy pill vs Mounjaro, you are really comparing two different types of medicine that happen to do a similar job. The Wegovy pill is oral semaglutide — the UK's first swallowable GLP-1 weight-loss medicine, approved by the MHRA on 11 June 2026. Mounjaro is tirzepatide, a once-weekly injection. One is a daily tablet for people who hate needles; the other is a jab with the strongest trial results seen so far. Here is a plain-English comparison, with real UK prices, so you can talk it through with a prescriber.
The short version: Mounjaro (tirzepatide) tends to produce more weight loss in trials, but it is an injection. The Wegovy pill offers strong results with no needles — a genuine option if injecting is the dealbreaker. A prescriber decides which is suitable for you.
Two different molecules
The Wegovy pill contains semaglutide, a GLP-1 receptor agonist. It mimics one gut hormone that curbs appetite and slows how quickly your stomach empties, so you feel full sooner and for longer.
Mounjaro contains tirzepatide, which acts on two hormone pathways — GLP-1 and GIP. That dual action is thought to explain why it edges ahead on weight loss in head-to-head research.
Both are prescription-only medicines. Neither is a shortcut — they work alongside reduced calories and more movement, and a GPhC-registered pharmacy or CQC-regulated clinic assesses whether they are right for you. For more background on the tablet, see our oral semaglutide in the UK guide.
Weight loss: what the trials show
This is where most people start. The numbers below come from the manufacturers' pivotal trials, so they are averages, not promises.
- Wegovy pill (oral semaglutide 25 mg): around 13.6% of body weight lost on average over 64 weeks in the OASIS 4 trial (2025); about 16.6% among people who took it consistently, with roughly 30% losing at least 20%.
- Wegovy injection (semaglutide 2.4 mg): about 15% in the STEP 1 trial.
- Mounjaro (tirzepatide 15 mg): about 21% in the SURMOUNT-1 trial.
In the SURMOUNT-5 head-to-head, tirzepatide reached roughly 20% versus about 14% for the semaglutide injection. So on averages alone, Mounjaro leads. But averages hide huge individual variation — some people do brilliantly on the tablet and stall on the jab. The medicine you will actually take every day (or week) matters more than a headline percentage.
Needles vs tablets
This is the honest reason many readers land here. Mounjaro is a once-weekly injection using a pre-filled pen — quick, but still a needle. The Wegovy pill is a single tablet taken once a day.
The tablet comes with a routine, though: an overnight fast, a small sip of plain water (no more than about 120 ml), and a 30-minute wait before eating, drinking or other medicines. Miss the empty-stomach rule and absorption drops sharply. We cover the whole ritual in how to take the Wegovy pill. Weekly injecting has no daily routine but does mean handling a pen and sharps disposal.
Neither is objectively "easier" — it depends on whether you would rather do a small daily task or a weekly jab.
Dosing schedules
Both start low and step up to reduce side effects. The Wegovy pill climbs 1.5 mg → 4 mg → 9 mg → 25 mg, with at least a month at each level — roughly three months to reach the full maintenance dose. Mounjaro also titrates upward over several weeks toward its maintenance dose. If you switch between them, you start the titration again; you cannot jump straight to a high dose.
Side effects
The two share a similar profile because both act on GLP-1. The most common effects are gastrointestinal: nausea, diarrhoea, constipation, vomiting and headache, usually worst just after a dose increase and easing as your body adjusts. Rarer but serious risks for both include pancreatitis, gallstones, dehydration that can strain the kidneys, and low blood sugar in people who also take diabetes medication.
Whichever you take, report any suspected side effect through the MHRA Yellow Card scheme. Our Wegovy pill side effects article walks through the first few weeks in detail.
Price: Wegovy pill vs Mounjaro in the UK
Mounjaro has been available privately in the UK for longer and is also NHS-funded in limited circumstances under NICE TA1026. The Wegovy pill, as of mid-2026, is private-prescription only — NHS funding would need a separate NICE appraisal. Private Mounjaro pricing varies widely by dose and provider, so we focus here on the medicine this site tracks: the Wegovy pill. The table below shows a sample of GPhC-registered pharmacies for the 1.5 mg starter dose (prices checked 17 July 2026).
| Provider | Starter (1.5mg) / 4 weeks | Maintenance (25mg) | Notes |
|---|---|---|---|
| Medicine Marketplace | £90.00 | £158.00 | Cheapest starter tracked |
| Curate | £94.00 | £154.00 | Lowest 25mg price |
| Manchester Chemist | £94.99 | £159.99 | — |
| The Weight Clinic | £115.00 (first month £80) | £190.00 | Our pick · code NEWME (£35 off) |
| Skin & Shape | £154.00 | £239.00 | Priciest tracked |
The starter dose ranges from £90 to £154 across providers — a £64 spread for the identical medicine. See every pharmacy on our homepage price table, or read the full breakdown in Wegovy pill price in the UK.
Our recommended provider is The Weight Clinic. They are a GPhC-registered pharmacy offering a discounted first month (£80), monthly video reviews with a prescriber, and a refund if the prescriber declines your request — which keeps the process honest rather than a hard sell.
So which should you choose?
If maximum average weight loss is your only priority and you are comfortable with a weekly injection, Mounjaro has the strongest trial numbers. If the thought of a needle is what has stopped you until now, the Wegovy pill gives you a credible, needle-free route with results in the same ballpark as the semaglutide injection. It is not a two-horse race with one winner — it is about fit. A prescriber will factor in your BMI (typically 30+, or 27+ with a weight-related condition), your medical history and your preferences.
Still torn between formats of the same drug? Our Wegovy pill vs Wegovy injection comparison, and the full 2026 Wegovy pill guide, go deeper.
Ready to explore the Wegovy pill?
The Weight Clinic is our recommended GPhC-registered provider: first month £80, £35 off with code NEWME, monthly video reviews, and a full refund if the prescriber decides it is not right for you.
This article is price and information only, not medical advice. The Wegovy pill and Mounjaro are prescription-only medicines; a prescriber decides suitability.
Frequently asked questions
Which loses more weight, the Wegovy pill or Mounjaro?
On trial averages, Mounjaro (tirzepatide) leads — around 21% at the 15 mg dose in SURMOUNT-1, versus about 13.6% for the Wegovy pill at 25 mg in OASIS 4 (about 16.6% among consistent users). But these are averages with wide individual variation, and the injection-vs-tablet choice matters as much as the numbers.
Is the Wegovy pill just as good as the Mounjaro injection?
Not identical, but competitive. The Wegovy pill's results sit close to the semaglutide injection and slightly below tirzepatide in head-to-head data. Its main advantage is that it is a daily tablet rather than a needle, which for many people is the deciding factor.
Can I switch from Mounjaro to the Wegovy pill?
Some people do, often because they want to stop injecting. You cannot jump straight to a high tablet dose — you restart the titration from 1.5 mg and step up over about three months. Any switch should be planned with your prescriber.
Is the Wegovy pill available on the NHS like Mounjaro?
Not yet. Mounjaro has limited NHS funding under NICE TA1026. As of mid-2026 the Wegovy pill is private-prescription only; NHS availability would require a separate NICE appraisal.
Do they have the same side effects?
Broadly yes. Both commonly cause nausea, diarrhoea, constipation, vomiting and headache, usually around dose increases. Rare serious risks for both include pancreatitis and gallstones. Report any suspected side effect via the MHRA Yellow Card scheme.
How much does the Wegovy pill cost compared with Mounjaro?
The Wegovy pill starter dose ranges from £90 to £154 per four weeks across UK pharmacies, rising with the dose. Private Mounjaro pricing varies by provider and dose too. Compare current Wegovy pill prices on our homepage price table.