Best Weight Loss Pills UK: Top Options Available in 2026

Weight loss injections are popular in the UK, but not everyone is eligible. Some people are also uncomfortable with needles and therefore need alternative solutions for weight loss. Tablets are a good option, and patients in the UK have many choices.

Some of the best tablets include the Wegovy pill, Foundayo, and Orlistat, which can lead to loss of about 16.6%, 12.4%, and 5%–10% of starting body weight, respectively. However, these results can vary depending on factors such as your body's response.

This guide covers some of the best diet pills UK pharmacies have to offer and how they work. We'll also explain how to buy them through Curely's weight loss service.

Quick Summary of Weight Loss Tablets (UK)

Types of Weight Loss Pills

There are two types of weight loss pills based on how they work:

Fat Absorption Blockers

These work in the digestive system, preventing the fat content in the food you eat from being absorbed so it passes through the body instead. Fat blockers don't affect appetite and instead rely on a healthy diet to help you lose weight.

GLP-1 Receptor Agonists

These weight loss pills help regulate appetite by mimicking a hormone called glucagon-like peptide-1 (GLP-1), which the gut releases after eating. This hormone slows stomach emptying and signals fullness to the brain. GLP-1 medications have long been weight-loss injections, such as the Mounjaro pen and Wegovy injection. However, oral versions are now available in the UK.

The Best OTC & Prescription Weight Loss Pills (UK)

Depending on your needs and goals, the following oral options can help in your weight loss journey:

1. Wegovy Pill (Oral Semaglutide)

Daily tablet for appetite control

Wegovy Pill

Weight loss support without injections

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Available in: 1.5mg, 4mg, 9mg, 25mg.

The Wegovy pill contains semaglutide, the same active ingredient found in the Wegovy injection. Both are prescription weight loss medications manufactured by Novo Nordisk. The Medicines and Healthcare products Regulatory Agency (MHRA) approved the Wegovy pill as the first-ever GLP-1 weight loss tablet in June 2026.

How it Works

Your stomach can't tell the difference between food and medication, so it would break down semaglutide before it can have any effect on your body. However, manufacturers combined semaglutide with a carrier molecule called SNAC (sodium N-(8-[2-hydroxybenzoyl]amino)caprylate) that protects it long enough to be absorbed into the body.

Once semaglutide reaches the bloodstream, it mimics the GLP-1 hormone to slow stomach emptying, making you feel full even after eating a small meal. It can also reduce food cravings. As a result, you'll eat less, which can lead to weight loss.

Expected Weight Loss Results

According to the OASIS 4 clinical trials, people on the highest dose of the Wegovy pill lost about 14% to 16.6% of their body weight. Your exact results may differ depending on factors such as how consistently you take the medication and your body's response.

Directions

You must take Wegovy according to your prescriber's instructions, which are usually as follows:

1. Take one pill once a day on an empty stomach.
2. Take the Wegovy pill with no more than 120 ml of water so that it doesn't dilute the SNAC concentration.
3. Wait at least 30 minutes before eating, drinking, or taking any other medications so your bloodstream can absorb the semaglutide.

Healthcare professionals recommend using Wegovy alongside a balanced diet and participating in regular exercise for the best results.

Eligibility Requirements

Wegovy pills are a prescription weight loss treatment available to people who meet the following criteria:

• Obese: Body mass index (BMI) of 30 or higher.
• Overweight: BMI of 27 to 29.9 with at least one weight-related medical condition such as high blood pressure, type 2 diabetes, high cholesterol, or obstructive sleep apnoea.
• Adult Age: Must be 18 or older.

These are the usual requirements at private clinics such as Curely.

Who Is Not Eligible?

• Women who are pregnant, planning to become pregnant, or breastfeeding.
• People with a personal or family history of medullary thyroid carcinoma (MTC) or Multiple Endocrine Neoplasia syndrome type 2 (MEN 2).
• Anyone with a history of severe pancreatitis or end-stage kidney disease.

Availability

You can buy Wegovy pills through Curely after a consultation. The pills are not yet available through the NHS (National Health Service). Only the Wegovy injection is available, but with stricter NICE (National Institute for Health and Care Excellence) criteria and access through Tier 3/4 specialist weight management services.

Common Side Effects

• Nausea and vomiting
• Diarrhoea
• Constipation
• Indigestion
• Stomach pain
• Headaches

2. Foundayo (Orforglipron)

Daily Oral GLP-1 Treatment

Foundayo

Helps reduce appetite and hunger.

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Available in: 0.8mg, 2.5mg, 5.5mg, 9mg, 14.5mg, 17.2mg

Foundayo is an oral GLP-1 receptor agonist that contains the active ingredient orforglipron. Eli Lilly manufactures the drug, which the MHRA approved in August 2026 for weight management and type 2 diabetes.

How it Works

Foundayo works by activating GLP-1 receptors in your body to help you feel fuller after eating and reduce appetite, making it easier to lower your calorie intake. Use Foundayo alongside a reduced-calorie diet and exercise to support weight loss.

Expected Weight Loss Results

According to the 72-week ATTAIN-1 clinical trial, people taking orforglipron lost an average of 7.4% to 11.1% of their starting weight, depending on the dose. In the ATTAIN-1 Phase 3 clinical trial, participants lost 12.4% of body weight at 72 weeks. Note, however, that your results may differ depending on your dose and how your body responds to treatment.

Directions

Foundayo is a small-molecule, non-peptide medication. This means you can take it without the food and water restrictions that apply to oral semaglutide as follows:

1. Take one pill once a day with or without food.
2. Swallow the tablet whole.
3. Do not chew, break, or crush the pill.

Eligibility Requirements

Foundayo is a prescribed treatment available to adults who meet the following criteria:

• Obese: BMI of 30 or higher.
• Overweight: BMI of 27 to 29.9 with at least one weight-related health condition.
• Adult: Must be 18 or older.

Who Is Not Eligible?

Foundayo may not be suitable for:

• Breastfeeding mothers.
• Pregnant or planning to become pregnant.
• People allergic to orforglipron or any of the ingredients in the tablets.
• Those with a history of MEN 2 or MTC.
• People with severe or chronic digestive issues such as gastroparesis (slow stomach emptying).

Availability

Although Foundayo has UK regulatory approval, it's still not available through the NHS. However, you can access it through Curely.

Common Side Effects

• Vomiting
• Diarrhoea
• Nausea
• Constipation
• Stomach pain

3. Orlistat (Prescription Strength)

Orlistat-Powered Weight Loss Support

Xenical

Supports weight loss alongside diet and exercise

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Available in: 120mg

Orlistat 120 mg is a prescription-strength pill, sold under the brand name Xenical. The medication reduces how much fat the body absorbs from your meals. Experts recommend using prescription-strength orlistat alongside a calorie controlled diet.

How it Works

Xenical can help you reach a healthy weight by blocking fat absorption from your meals. Your digestive system uses enzymes called lipases to break down the fat in your food so your body can absorb it. Orlistat blocks some of these enzymes in your stomach and small intestine.

The unabsorbed fat leaves the body in your stools. This reduces the number of calories your body absorbs from dietary fat, which can help you lose excess weight.

Expected Weight Loss Results

On average, people lose 5% to 10% of body weight when taking Xenical. Long-term trials like the 4-year XENDOS study showed patients losing about 5.8 kg.

Directions

Take prescription-strength orlistat as follows:

1. Take one 120mg capsule with each main meal containing fat, up to three times daily.
2. Take the capsule immediately before, during, or up to one hour after your meal.
3. Skip your dose if you miss a meal or if the food doesn't contain any fat.
4. Follow a nutritionally balanced, low-calorie diet, with around 30% fat.

Eligibility Requirements

Xenical is suitable for adults who meet one of the following criteria:

• Obese: BMI of 30 or higher.
• Overweight: BMI of at least 28 with a health risk factor such as heart disease or diabetes.
• Adults: Aged 18 and older.

Who Is Not Eligible?

Prescription-strength orlistat isn't suitable for everyone. You shouldn't take it if you have:

• Chronic malabsorption syndrome, where your body has difficulty absorbing nutrients from food.
• Cholestasis, a condition that affects the flow of bile from the liver.
• An allergy to orlistat or another ingredient in the medication.
• Breastfeeding or pregnant.

Availability

Orlistat 120mg is a prescription-only medication in the UK. You can get it through the NHS if you meet the relevant prescribing criteria. Alternatively, get it through registered private healthcare providers such as Curely after completing a consultation.

Common Side Effects

• Oily or fatty stools
• Needing to go to the toilet more urgently
• Passing wind, sometimes with an oily discharge
• Stomach pain or discomfort

4. Alli / Orlos (OTC Orlistat)

Available in: 60mg

Alli and Orlos contain 60mg of orlistat, which is half the dose found in prescription-strength capsules. Both are weight loss treatments offered over the counter.

How it Works

Alli and Orlos block the stomach and small intestine from breaking down and absorbing some of the fat in your meals. Orlistat 60mg can prevent the absorption of around 25% of the dietary fat you eat. The unabsorbed fat then passes through the body in your stools.

Expected Weight Loss Results

Trial participants taking orlistat 60mg alongside a reduced-calorie diet lost an average of 5% to 10% of their starting body weight. The medication can help you lose 1kg more for every 2kg you lose through diet and exercise. However, your results may be different depending on how your body responds to the medication.

Directions

The usual directions for Alli and Orlos are:

1. Take one 60mg capsule up to three times a day.
2. Take it immediately before, during, or within one hour after a main meal containing fat.
3. Don't take more than three capsules in 24 hours.
4. Skip the pill if you miss a meal or eat food that contains no fat.

Eligibility Requirements

Alli and Orlos are intended for adults who meet the following criteria:

• BMI: 28 or above.
• Age: Must be 18 years or older.
• Lifestyle Commitment: You must commit to a reduced-calorie diet and regular exercise.

Who Is Not Eligible?

You shouldn't take 60mg orlistat if you:

• Have chronic malabsorption syndrome.
• Have cholestasis.
• Are pregnant or breastfeeding.
• Take ciclosporin.
• Take warfarin or other oral anticoagulants.
• Are allergic to orlistat or another ingredient in the capsules.

Availability

Alli and Orlos are available over the counter without a prescription. However, a pharmacist should assess your suitability before supplying the medication. You can pause or stop treatment if you haven't lost weight after 12 weeks and speak to your doctor or pharmacist.

Side Effects

Orlistat side effects are similar to Xenical. They include:

• Oily or fatty stools
• More frequent bowel movements
• Passing wind
• Stomach pain

Which Weight Loss Pill Is Best For You?

The best tablet for you often depends on the following factors:

• Eligibility: BMI thresholds and existing health conditions determine what a clinician can prescribe. It's an important step, even with online doctors, to ensure the medication is safe for you.
• Weight Loss Goals: Some pills trigger rapid weight loss while others offer more modest weight management. A prescriber can recommend the best option based on how quickly you need to lose weight or how much you need to lose.
• Medical Conditions & Risk Factors: Patients with Type 2 diabetes or insulin resistance may need additional health benefits such as lower blood sugar and reduced risk of heart-related conditions. GLP-1 medications usually offer these additional benefits and may be the better option for such patients.

Get Legitimate Weight Loss Pills with Curely

Curely is a UK-registered online pharmacy that provides different weight loss treatments after a quick consultation. Complete a short online consultation covering your medical history, overall health, BMI, and weight loss goals. Our qualified clinician will review your answers and recommend the most suitable option.

Once approved, we'll deliver the medication to your door in discreet packaging. All our treatments are clinically proven to help manage excess body weight. Curely also offers accessories and ongoing support throughout your treatment.

Start your consultation today.

FAQs

Can You Buy Weight Loss Pills Over the Counter in the UK?

Yes, but only the lower-strength orlistat products. Adults can buy Alli and Orlos at 60mg from a pharmacy without a prescription. Foundayo, Wegovy pill, and Xenical are not available without a prescription.

Do Weight Loss Pills Work Without Dieting?

No. Every weight loss medication available in the UK is licensed for use alongside a reduced-calorie diet and increased physical activity. Clinical trials show that a healthy diet and exercise contribute to weight loss results.

How Long Do You Need to Take Weight Loss Pills?

It depends on the treatment and how you respond. Doctors recommend starting on the lowest dose of GLP-1 medications for at least four weeks before increasing it, and eventually reaching a maintenance dose. Experts may recommend stopping orlistat if you don't notice significant weight loss in 12 weeks. Your clinician will advise on the best duration for each medication.

Can You Take Weight Loss Pills and Injections Together?

No. Avoid taking weight loss pills and injections together unless your doctor prescribes it. Taking two medications at the same time can increase the severity of side effects and risk of pancreatitis or gastroparesis (stomach paralysis). Speak to Curely if you're not seeing meaningful results on your current treatment, and we'll recommend the best options.

Final Thoughts

While weight loss injections work well for some, other patients may prefer or only qualify for a tablet option. There are many weight loss tablets approved in the UK, including GLP-1 options such as Wegovy pill and fat blockers such as Xenical.

The best weight loss pill for you depends on your eligibility, weight loss goals, overall health, and any medical conditions you may have. Curely can help you find the most ideal treatment after a quick online assessment. Reach out today for a consultation.

Reference List

• Lilly E. Lilly’s oral GLP-1, orforglipron, demonstrated meaningful weight loss and cardiometabolic improvements in complete ATTAIN-1 results published in The New England Journal of Medicine | Eli Lilly and Company. Eli Lilly and Company. 2024.
• Sjöström L. Analysis of the XENDOS study (Xenical in the Prevention of Diabetes in Obese Subjects). Endocr Pract. 2006;12 Suppl 1:31-33.
• Wharton S, Aronne LJ, Stefanski A, et al. Orforglipron, an Oral Small-Molecule GLP-1 Receptor Agonist for Obesity Treatment. New England Journal of Medicine. 2025;393(18):1796-1806.
• Wharton S, Ildiko Lingvay, Bogdanski P, et al. Oral Semaglutide at a Dose of 25 mg in Adults with Overweight or Obesity. New England Journal of Medicine. 2025;393(11):1077-1087.
• Zohrabian A. Clinical and economic considerations of antiobesity treatment: a review of orlistat. ClinicoEconomics and Outcomes Research. Published online July 2010:63.