Foundayo pill: a new oral weight management tablet

Foundayo is the latest GLP-1 medication to become available in the UK – but how does it work, and how does it compare with familiar treatments such as Wegovy and Mounjaro?

We look at what makes this new GLP-1 medication different, who it is suitable for, and what you need to know before considering it.

What is Foundayo?

Foundayo (Orforglipron) is the fourth weight loss medication (GLP-1s) approved for prescription in the UK and the second once-daily tablet option.

Unlike the Wegovy pill, it can be taken at any time of day, without the need to plan around food or drink, making it a more flexible option for some people.

Foundayo provides another option for people starting medicated weight management to help regulate appetite and food intake, as well as potentially supporting longer-term weight management for those switching over from an injectable form.

The most suitable treatment will depend on factors including overall health, weight-management goals, medical history, lifestyle, and personal preferences.

Having another treatment available gives patients more choice when deciding what is most appropriate at different stages of their weight loss journey, but it can add to the complexity.

Foundayo: Headline facts

• Active ingredient: Orforglipron.

• Medication class: Non-peptide GLP-1 receptor agonist.

• Doses: 0.8 mg, 2.5 mg, 5.5 mg, 9 mg, 14.5 mg, and 17.2 mg.

• Frequency: One tablet taken daily with or without food.

• MHRA approval: 10 August 2026.

• Manufacturer: Eli Lilly.

Who is Foundayo licensed for?

Foundayo was licensed in the UK in August 2026 for the treatment of type 2 diabetes and as weight management for eligible patients including:

• Adults with a BMI of 30 kg/m² or above.

• Adults with a BMI between 27 and 30 kg/m² who have at least one weight-related health condition.

How does Foundayo work?

Foundayo works by mimicking a naturally occurring hormone called glucagon-like peptide-1 (GLP-1), which is released from your gut after eating.

GLP-1 plays an important role in regulating:

• Hunger.

• Fullness and satiety.

• Blood sugar levels.

• Food cravings.

• Stomach (gastric) emptying.

Naturally occurring GLP-1 is short-acting, but medications such as Foundayo amplify these signals for much longer.

How does Foundayo affect appetite?

• Feel fuller for longer.

• Feel satisfied after eating smaller portions.

• Feel less hungry between meals.

• Have less desire to snack.

• Experience fewer thoughts about food, sometimes described as “food noise”

These effects can make it easier to reduce your food intake and support weight loss.

Benefits beyond weight loss

We are constantly discovering benefits of GLP-1 medications that extend beyond weight loss, including improvements in glucose reduction and evidence of cardiovascular and kidney protection, some of which appear to occur independently of the amount of weight lost.

How is Foundayo different from the Wegovy pill?

Foundayo and the Wegovy pill both activate the GLP-1 receptor, but they work in different ways. The main difference is how they are absorbed and how they need to be taken.

Foundayo

Foundayo contains orforglipron, a small, non-peptide molecule. It can be absorbed by the body without the same restrictions as oral semaglutide, the active ingredient in the Wegovy pill.

It can be taken at any time of day – with or without food – and without needing to wait before taking other medicines.

Wegovy pill

The Wegovy pill contains semaglutide, a peptide made up of amino acids. Peptides are difficult for your body to absorb when taken by mouth, so the tablet contains an ingredient that helps semaglutide reach the bloodstream.

To support absorption, it needs to be taken first thing in the morning with a small amount of water, followed by a 30-minute wait before eating, drinking, or taking other tablets.

		Take 30 mins before eating and drinking
		Take with a small amount of water
		Take 30 mins before taking other medicine

For patients, that means greater flexibility and fewer rules around when to take their medication, which may make it easier to fit treatment into everyday life.

Why might you choose Foundayo?

Whilst injectable Wegovy and Mounjaro will remain excellent options for many people, achieving potentially greater amounts of weight loss more quickly, oral weight loss medication may suit you and your lifestyle better:

If you prefer not to inject

The most obvious reason is if you simply don’t like needles.

Although most people find the pens simple to use, you might just not feel comfortable with self-injecting. A daily pill may feel more familiar and comfortable.

If you want more flexibility around when you take it

The ability to take Foundayo alongside other medication, food, drink, and at any time of the day makes an oral pill a more flexible choice as compared to oral Wegovy.

If you’re thinking about longer-term weight maintenance

Reaching your target weight can raise a new question: What happens next? You may feel nervous about continuing medication indefinitely but may also be concerned about regaining weight by stopping altogether.

Foundayo has been shown to support meaningful weight maintenance for patients who switched from injected Mounjaro when compared to placebo, in addition to sustained improvements in blood pressure, cholesterol and blood glucose control.¹

If you want a gentler level of support

Not everyone needs or wants a treatment associated with the greatest possible weight loss.

If you have more modest weight loss goals – or if your goal is focused more on improving your long-term health or weight-related conditions – oral GLP-1s may provide enough support to help you see significant improvements.

Ultimately, the best treatment depends on your medical history, health goals, lifestyle, and personal preferences.

If you have experienced injection-site reactions

Although uncommon, some patients experience redness, itching, or irritation around injection sites. A pill formulation avoids this issue altogether.

If you want a simpler and more sustainable option

Oral GLP-1s don’t require injection pens, needles, or sharps bins. They are easier to travel with and generate less plastic waste than injectable treatments.

What are the benefits of Foundayo?

Weight loss

Like injectable GLP-1s, Foundayo works by helping you feel fuller sooner, reducing hunger, and decreasing food noise.

For many people, this makes it easier to eat smaller portions, reduce snacking, and make more conscious food choices without feeling constantly deprived.

In turn this can lead to significant weight loss, even when other methods haven’t been successful.

Weight maintenance

Achieving a healthy weight is only half the battle – keeping it off is just as hard.

Although lifestyle and behaviour changes can make a big difference, many of the factors that contribute to weight gain remain after you lose weight.

In fact, our biology works actively against us after weight loss, making it easier to regain weight and to return to our previous size.

GLP-1 medications such as Foundayo can help counteract some of these biological drivers and help you maintain the progress you have worked so hard to achieve.

Improving health

Weight loss is only one part of the story.

Most people using GLP-1 medications see improvements in blood sugar control, blood pressure, cholesterol levels, fatty liver disease, and other markers of metabolic health.

Having improved their weight and metabolic health – the way the body stores and accesses energy from food – they often enjoy renewed energy, improved body confidence, are able to move more easily, and feel more in control of their health.

You might consider Foundayo as part of a wider health improvement strategy rather than simply a way of reducing the number on the scales.

How effective is Foundayo?

Foundayo can help you achieve clinically meaningful weight loss, which could significantly improve your health.

In trials, adults who combined Foundayo with lifestyle changes over 72 weeks achieved an average weight loss of 7% using the 5.5 mg pill, 8% weight loss using 9 mg, and 11.2% at the maximum dose of 17.2 mg.²

How do weight loss medications compare?

There are now several oral and injectable medications available for weight management.

They differ in how they’re taken, how often you take them, the weight loss seen in clinical trials, and how well they fit into everyday life.

*Please note: These figures come from separate clinical trials rather than studies directly comparing the medications with each other. They show the average weight loss in each study where medication was titrated up to a maximum dose alongside lifestyle and behavioural support. Each trial lasted between 15 and 16.6 months.

It’s important to remember that choosing the “best” medication isn’t simply about achieving the greatest weight loss.

Convenience, side effects, lifestyle fit, medical history, and personal preference all play an important role in determining which treatment is right for you.

Side effects of Foundayo

As with all GLP-1 medications, side effects can be experienced with Foundayo, but these are usually mild, well tolerated, and often settle over time.

The most common side effects are similar to those experienced with other GLPs:

• Feeling sick (nausea).

• Being sick (vomiting).

• Diarrhoea.

• Constipation.

• Abdominal discomfort.

• Indigestion.

Most side effects are mild-to-moderate in nature and occurred when treatment is started or during dose increases. Many people find that symptoms improve as their body adapts to treatment.

Rates of gastrointestinal side effects reported with Foundayo appear to be broadly similar to those seen with injectable GLP-1 treatments, but perhaps less so than oral Wegovy.

Serious side effects

Serious side effects are uncommon but can include:

Severely low blood sugar (hypoglycaemia) is generally uncommon when GLP-1 medications are taken alone but may occur when combined with certain diabetes medications such as insulin or sulfonylureas (for example, gliclazide).

Anyone experiencing severe abdominal pain, persistent vomiting, or symptoms of a severe allergic reaction should seek urgent medical attention.

Who should not take Foundayo?

GLP-1 medication such as Foundayo is not suitable for everyone.

You should not take Foundayo if you:

• Have a personal or family history of medullary thyroid carcinoma.

• Have Multiple Endocrine Neoplasia syndrome type 2 (MEN2).

• Are pregnant or planning a pregnancy.

• Are breastfeeding.

• Have a known allergy to orforglipron or any ingredient in the tablet.

Extra caution may be required in people with a history of pancreatitis, significant gastrointestinal disorders, or previous bariatric surgery.

A full medical assessment should always be undertaken before starting treatment.

Can you switch between tablets and injections?

Yes. For some patients, switching between formulations may be appropriate.

In a clinical trial looking at weight maintenance, patients were able to switch directly from the highest dose of Mounjaro to Foundayo and tolerate the change well.¹ Switching from injected or oral Wegovy is also possible.

Switching between medications should be supervised by an appropriately trained healthcare professional, who can choose the right dose for you and help minimise side effects.

As with injectable Wegovy and Mounjaro, Foundayo will remain a prescription-only medicine and should only be used under appropriate medical supervision.

Final thoughts

The approval of Foundayo is an exciting addition to the treatments available to support weight care for patients living with obesity and overweight in the UK.

For people who prefer not to inject, want a more flexible and convenient pill option, or who are looking for a way to maintain weight loss after injections, Foundayo may provide an attractive new choice.

As with all weight management medications, the best results occur when treatment is combined with personalised support around nutrition, physical activity, behaviour change and long-term health habits.

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1. Aronne et al: Orforglipron for maintenance of body weight reduction
2. Wharton et al: Orforglipron, an Oral Small-Molecule GLP-1 Receptor Agonist for Obesity Treatment
3. Wharton et al: Oral Semaglutide at a Dose of 25 mg in Adults with Overweight or Obesity.
4. Wilding et al: Once-Weekly Semaglutide in Adults with Overweight or Obesity
5. Jastreboff et al: Tirzepatide Once Weekly for the Treatment of Obesity.

About the authorView full bio

Dr Nienke Lees

Women’s Health Service Lead

MB BChir, MA, MRCS(ENT), DOHNS, MRCGP, LMCA

Dr Nienke Lees is the Women’s Health Service Lead at Genwell.

About the reviewerView full bio

Dr Colin Tidy, MRCGP

General Practitioner, Medical Author

MBBS, MRCGP, MRCP (Paediatrics), DCH

Dr Colin Tidy is an NHS Doctor, based in Oxfordshire.

Article history

The information on this page is peer reviewed by qualified clinicians.

Article also available inEnglish,German,Spanish,French,Italian,Portuguese,Hindi,Hebrew,Arabic, andSwedish.

• Next review due: 4 Oct 2029

• 4 Oct 2026 | Originally published

  Dr Nienke Lees
  Dr Colin Tidy, MRCGP

Disclaimer: The views expressed in the community do not represent medical advice. For any health concerns, consult your GP or healthcare provider.

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