Choosing a weight loss tablet used to mean one option in the UK: Orlistat. That has changed considerably in recent months, with the arrival of the Wegovy pill and now Foundayo, giving patients an oral choice for the first time between three genuinely different types of medicine. It is easy to see why this is causing confusion. All three are tablets, all three are marketed for weight loss, and yet they work in completely different ways, come with different levels of effectiveness, and suit different types of patient.
At Everest Pharmacy, we are asked almost daily which tablet is “the right one,” and the honest answer is that it depends entirely on your goals, your medical history, and how much weight loss you are hoping to achieve. Orlistat has been a trusted option for over two decades, the Wegovy pill has brought GLP-1 treatment into tablet form for the first time in the UK, and Foundayo, freshly authorised by the MHRA, is set to become the next major addition to that lineup.
This guide breaks down exactly how Orlistat, the Wegovy pill and Foundayo differ, what the evidence says about each, and how to work out which might be worth discussing with a clinician. If you would like personalised advice rather than working it out alone, contact our team today.
What Is Orlistat?
Orlistat is a long-established weight loss medicine that works by blocking around a third of the fat you eat from being absorbed by the gut. Unlike GLP-1 medicines, it has no effect on appetite or hunger signals. Instead, it acts locally in the digestive system, meaning unabsorbed fat passes through and is excreted rather than stored.
Orlistat is available in the UK in two strengths. A lower 60 mg dose is sold over the counter under the brand name Alli, while a 120 mg prescription-strength version is available as Xenical or generic orlistat through a pharmacy or GP following a consultation. It has been used safely by patients for more than twenty years, making it the most established of the three treatments covered here.
What Is The Wegovy Pill?
The Wegovy pill is an oral form of semaglutide, the same active ingredient used in the Wegovy injection, developed by Novo Nordisk. It works as a GLP-1 receptor agonist, mimicking a natural gut hormone to reduce appetite, slow digestion, and support a feeling of fullness after eating.
Because semaglutide is a peptide rather than a small molecule, it does not survive digestion easily. To get around this, the Wegovy pill uses an absorption enhancer, but this only works reliably if the tablet is taken on an empty stomach with a small amount of water, followed by a wait of at least thirty minutes before eating, drinking, or taking other medicines. This makes daily timing an important part of how the Wegovy pill needs to be used. You can read more about how this medicine works in our guide on how semaglutide works.
What Is Foundayo?
Foundayo is the brand name for orforglipron, a newer GLP-1 receptor agonist developed by Eli Lilly. On 10 August 2026, the MHRA authorised orforglipron for weight management and type 2 diabetes, making the UK the first country in Europe to approve this medicine.
Unlike semaglutide, orforglipron is a small molecule rather than a peptide, which means it does not rely on an absorption enhancer and does not require the same empty-stomach rule as the Wegovy pill. It can be taken at any time of day, with or without food, and without specific water restrictions, which is a significant difference in day-to-day convenience. Foundayo is expected to launch soon through Everest Pharmacy and our partner platform, Everslim.
How Each Medicine Works: The Key Differences
The most important distinction between these three tablets is their mechanism of action, which explains why their effectiveness and side effects differ so much.
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- Orlistat works locally in the gut, blocking the enzyme responsible for breaking down dietary fat so that around a third of it is not absorbed. It does not affect appetite or the brain’s hunger signals.
- The Wegovy pill works on GLP-1 receptors throughout the body, including in the brain, to reduce appetite, slow gastric emptying, and support satiety after meals.
- Foundayo works on the same GLP-1 receptors as the Wegovy pill, using a different chemical structure that allows for more flexible dosing without the same food and water restrictions.
This is why Orlistat is often described as working “outside” the body’s hunger system, while the Wegovy pill and Foundayo work by changing how hungry you feel and how satisfied you become after eating.
Comparing Effectiveness
Weight loss results vary considerably between these three medicines, largely because of how differently they work.
| Treatment | Typical Average Weight Loss | Mechanism | Timeframe Studied |
|---|---|---|---|
| Orlistat (120 mg) | Around 5 to 10% of body weight | Fat absorption blocker | Up to 1 year, alongside a reduced-fat diet |
| Wegovy pill (oral semaglutide) | Around 13 to 15% | GLP-1 receptor agonist | 68 to 72 weeks |
| Foundayo (orforglipron) | Around 11 to 12% | GLP-1 receptor agonist | 72 weeks |
Orlistat generally produces more modest results than either GLP-1 tablet, but it can still be a meaningful option for patients who prefer a non-hormonal approach or who are not suitable for GLP-1 treatment. The Wegovy pill and Foundayo sit closer together in effectiveness, with the main practical difference coming down to convenience rather than raw weight loss figures.
Comparing Side Effects
Because Orlistat and the GLP-1 tablets work through entirely different systems in the body, their side effects are also very different.
Orlistat’s side effects are almost all related to undigested fat passing through the gut, and tend to be more noticeable if a meal is higher in fat than usual. Common effects include:
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- Oily or fatty stools
- Increased flatulence, sometimes with oily discharge
- Urgent or more frequent bowel movements
- Stomach pain or discomfort
These effects are often described by patients as a useful, if uncomfortable, reminder to stick to a lower-fat diet while taking the medicine.
The Wegovy pill and Foundayo share a similar side effect profile, as both work on the same GLP-1 pathway. Common effects for both include:
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- Nausea, particularly during dose increases
- Diarrhoea or constipation
- Indigestion or heartburn
- Reduced appetite, which is also the intended effect
- Fatigue or headache
GLP-1 side effects tend to be most noticeable in the early weeks of treatment and during dose escalation, then settle as the body adjusts.
Accessibility And How Each Medicine Is Taken
Beyond effectiveness and side effects, how each medicine fits into daily life is often the deciding factor for patients.
| Treatment | Availability | Dosing Instructions | Water/Food Restrictions |
|---|---|---|---|
| Orlistat | Over the counter (60 mg) or prescription (120 mg) | Taken with meals containing fat, up to three times daily | Best avoided with very low-fat meals, as there is little for it to act on |
| Wegovy pill | Prescription only, via consultation | Once daily, on an empty stomach | Must be taken with a small sip of water, then wait 30 minutes before food, drink or other medicines |
| Foundayo | Prescription only, launching soon via Everest Pharmacy and Everslim | Once daily, any time | None |
For patients who find rigid daily routines difficult to maintain, this table alone often narrows the decision considerably. Orlistat needs to be timed around meals, the Wegovy pill needs a fasting window each morning, and Foundayo is designed to fit around whatever routine suits the patient best.
Who Might Suit Each Option
There is no single “best” choice among these three tablets, as suitability depends heavily on individual circumstances.
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- Orlistat may suit patients who prefer a non-hormonal option, have already tried or are not suitable for GLP-1 treatment, or want a medicine available without a full prescription pathway.
- The Wegovy pill may suit patients who are comfortable with a consistent morning routine and want a well-established GLP-1 option with a strong evidence base in tablet form.
- Foundayo may suit patients who want GLP-1 treatment but find the timing restrictions of the Wegovy pill difficult to manage, or who have irregular daily routines such as shift workers or frequent travellers.
A proper clinical assessment is the only reliable way to determine which of these is appropriate for you, taking into account your BMI, medical history, current medications, and personal weight loss goals.
Can These Medicines Be Combined Or Switched?
Orlistat works through a completely different mechanism to GLP-1 medicines, so in principle it does not directly interact with the way the Wegovy pill or Foundayo work. However, combining weight loss medicines should never be done without medical advice, as your prescriber needs to assess the full picture of your health, other medications and how your body is responding to treatment.
Switching between the Wegovy pill and Foundayo, or moving from Orlistat to a GLP-1 medicine, is something that should always be discussed with a clinician rather than decided independently, particularly given the different eligibility criteria and monitoring needs of each treatment. For a closer look at how the two current GLP-1 pill options compare with each other in more depth, our article on Mounjaro vs Wegovy is a useful companion read, even though it focuses on injectable treatments.
Why Speak To A Pharmacist Before Choosing
With three oral weight loss options now available in the UK, the temptation is to pick based on convenience or headline weight loss percentages alone. In reality, the right choice depends on far more than the numbers in a comparison table. A pharmacist or clinician can assess your BMI, existing health conditions, other medications, and previous experience with weight loss treatments, and help you understand realistic expectations for whichever option is suitable.
This is particularly important for GLP-1 medicines, which are prescription-only and require ongoing monitoring, as well as for higher-strength Orlistat, which still needs an initial assessment even though a lower dose is available over the counter.
How Everest Pharmacy Can Help
At Everest Pharmacy, we offer access to Orlistat and the Wegovy pill now, with Foundayo expected to launch soon following its recent MHRA authorisation. Our approach is the same for all three: a proper clinical assessment first, clear guidance on how to use the medicine correctly, and ongoing support throughout your treatment.
If you are trying to work out which option might suit you, our team can talk through your goals and medical history and recommend the most appropriate path forward, rather than leaving you to guess. You can also explore our full weight loss services page for an overview of everything currently available.
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Frequently Asked Questions
Can I buy Orlistat without seeing a pharmacist or GP?
The lower 60 mg strength (Alli) can be bought over the counter, but a short pharmacist consultation is usually still required to confirm it is safe for you. The stronger 120 mg prescription version requires a full clinical assessment.
Why does the Wegovy pill need to be taken on an empty stomach but Foundayo doesn’t?
The Wegovy pill is a peptide medicine that relies on a special absorption enhancer to survive digestion, which only works reliably without food in the stomach. Foundayo is a small molecule that is naturally more stable, so it does not need this same absorption process.
Does Orlistat affect appetite in the same way as the Wegovy pill or Foundayo?
No. Orlistat has no direct effect on appetite or hunger signals. It works by reducing fat absorption in the gut, whereas the Wegovy pill and Foundayo work on appetite regulation in the brain and digestive system.
Is it normal to experience digestive side effects with Orlistat if I eat a low-fat meal?
Side effects from Orlistat are usually less noticeable with lower-fat meals, since the medicine has less fat to act on. Many patients find that adjusting meal composition helps manage these effects.
Which of these three options has been used in the UK for the longest?
Orlistat, having been available for over two decades. The Wegovy pill and Foundayo are both much newer additions to the UK weight loss market.
Could I be prescribed Orlistat if I’m not eligible for a GLP-1 medicine?
Possibly. Orlistat has different eligibility criteria to GLP-1 treatments and may be considered for patients who are not suitable for or do not wish to use a GLP-1 medicine. This would need to be assessed individually.
Do I need to follow a specific diet alongside any of these medicines?
Yes. All three are intended to be used alongside a reduced-calorie or reduced-fat diet and increased physical activity, rather than as a standalone solution. Orlistat in particular works best alongside a lower-fat eating pattern.
Will Foundayo be more expensive than the Wegovy pill once it launches?
Pricing for Foundayo has not yet been confirmed in the UK. Our team will share accurate cost information as soon as it becomes available through Everest Pharmacy and Everslim.
Finding The Right Weight Loss Tablet For You
Orlistat, the Wegovy pill and Foundayo each offer a genuinely different approach to weight loss, and none of them is automatically the “better” choice. What matters is finding the option that fits your health profile, your daily routine, and the level of support you want along the way.
If you are ready to explore which of these might be right for you, contact our team for a consultation, or start your assessment online today.