Treatment options

  • Next day delivery
  • Discreet & confidential
  • UK licensed medication
Alli - welzo
Alli - welzo
Nathalie Hayek reviewed
"Customer service was quick to respond and medication arrived the very next day!"
Anthony Limasol reviewed
"Quick, fast and reliable service. Use Welzo monthly for my medication."
Remeece Freeman reviewed
"No fuss, and fast delivery. Welzo dispatched my order the same day and it arrived in the morning."


Alli - welzo
Alli - welzo
Nathalie Hayek reviewed
"Customer service was quick to respond and medication arrived the very next day!"
Anthony Limasol reviewed
"Quick, fast and reliable service. Use Welzo monthly for my medication."
Remeece Freeman reviewed
"No fuss, and fast delivery. Welzo dispatched my order the same day and it arrived in the morning."
8 Reviews
Sale price £37.73
In stock.
8 Reviews

Alli is a non-prescription weight-loss medication that can be effective with lifestyle and diet changes. The active...

Alli is a non-prescription weight-loss medication that can be effective with lifestyle and diet changes. The active ingredient orlistat helps to lessen the amount of fat absorbed by the body from an individual's food intake.

Free delivery by Tomorrow, April 27.
Order within
84 capsules £37.73
Pricing is provided as a reference. Treatment will be shown after completing the consultation. The final decision on issuing this medication remains with the prescriber.
Email when stocked
Secure Transaction
In stock.
As seen in
The_Daily_Mirror_logo - welzo
yahoo_01d90440-d295-40e7-9266-347e0db579ff - welzo
metro_1 - welzo
100% UK-based pharmacies
Our team of doctors, network of pharmacy suppliers and our support staff, are all UK-based.
Free advice and support
Have a question? Email support is always free; Monday - Friday, 9am - 5pm.
Free UK delivery over £40
Fast, securely delivered, tracked next-day United Kingdom delivery from £3.99. Or free when over £40.
We’re rated 4.9 out of 5
Based on over 24,000+ reviews on Trustindex, Trustpilot and Google.
Nathalie Hayek reviewed
"Customer service was quick to respond and medication arrived the very next day!"
Anthony Limasol reviewed
"Quick, fast and reliable service. Use Welzo monthly for my medication."
Remeece Freeman reviewed
"No fuss, and fast delivery. Welzo dispatched my order the same day and it arrived in the morning."
As seen in
The_Daily_Mirror_logo - welzo
yahoo_01d90440-d295-40e7-9266-347e0db579ff - welzo
metro_1 - welzo


Alli for Weight Loss

Alli is a weight loss aid tablet which prevents fat from being digested so the extra calories from dietary intake are passed through your stools instead. Weight loss tablets are often prescribed or given when a combination of diet and lifestyle changes have not been sufficient enough for weight loss.

Weight loss medication needs to be used in conjunction with eating a balanced diet and partaking in regular exercise.

What is Alli and how does it work?

Alli is a peripherally acting medicine that contains the active ingredient orlistat. This medicine binds itself to the body's natural enzymes and breaks down some of the fats consumed in food. Alli can stop about 25% of the fat from your meals from being absorbed into the body. Instead, this fat will be passed from the body through the stools.

Alli is not recommended for pregnant or breastfeeding women.

Alli is only intended for use by adults aged 18 and over who are overweight with a body mass index (BMI) of 28 or above.

Is Alli right for me?

If you suffer from obesity, Alli may be an effective treatment. However, it may not be suitable for you if you have the following:

  • If you are allergic to orlistat or any other ingredients in this medicine
  • If you are pregnant or breastfeeding
  • If you are taking warfarin or other blood-thinning medications
  • If you are taking ciclosporin
  • If you have cholestasis
  • If you have problems absorbing food
  • If you have diabetes
  • If you have kidney disease

Side Effects

All medications can cause potential side effects, below we have listed some potential side effects of Alli. However, these do not always occur and are mostly mild in nature. But if you experience any prolonged or worrying side effects of Alli, please discontinue the medication immediately and consult your doctor.

Common side effects include:

  • Sudden bowel movements
  • Fatty or oily stools
  • Soft stools
  • Flatulence (wind), with or without oily spotting
  • Stomach (abdominal) pain
  • Incontinence
  • Runny/liquid stools
  • More frequent bowel motions
  • Anxiety

How to take Alli?

Always take Alli exactly as prescribed by your doctor or advised by the pharmacist. The recommended starting dose is three (60mg) tablets a day, however, in presence of other factors, this may be increased or decreased accordingly as per the prescriber's clinical judgement. 

  • Alli is typically taken three times a day. It should be taken immediately before, during or up to one hour after a meal
  • Swallow the capsule with water
  • The usual dose is one capsule with breakfast, lunch and dinner.
  • Alli will not work if you miss a meal, or if there is no fat in your meal.
  • If you eat a high-fat meal, do not take more than your recommended dose
  • Do not take Alli if pregnant or breast-feeding

Only 3 doses of Alli should be taken in 24 hours. Do not take more than 3 capsules a day.

Warnings and Precautions

Alli may not be safe if taken with other medication or recreational drugs. Please inform the prescriber if you are taking any of the listed medications.

DO NOT take Alli:

  • If you are allergic to orlistat or any other ingredients in this medicine
  • If you are pregnant or breastfeeding
  • If you are taking warfarin or other blood-thinning medications
  • If you are taking ciclosporin
  • If you have cholestasis
  • If you have problems absorbing food
  • If you have diabetes
  • If you have kidney disease

The above-listed warnings are not exhaustive, please consult a doctor, pharmacist or nurse if you have further questions on the use of this medication or potential interactions with other medicines.


Next-Day Delivery Guarantee

All orders placed before 14:00 on weekdays will be delivered the next working day. For the majority of the UK, medication will be dispatched by Royal Mail, Monday to Friday, if ordered before 14:00. Dispatches are sent using Royal Mail's Next-Day Tracked 24-Hour service. We will email you tracking information directly and you should receive your order the day after dispatch.


Our Discreet Packaging Promise

We know that many of our customers turn to us when they need personal medication, preferring to use our online service rather than shopping for the product face to face. That is why our delivery is always discreetly packaged in plain brown boxes or enveloped. You will not have to worry about any content descriptions, and the package will be for your eyes only!

Product reviews

Complete a Quick & Free Online Consultation

This is a quick process and should only take 1 - 2 minutes. All of your answers are confidential, and just like a GP consultation, you will know what treatment is most suitable for you instantly upon completion.

Place Your Order for Alli and Upload ID

Once you have completed the quick online form, select the treatment option most suitable to you and checkout securely. If you are eligible for treatment you will be asked to upload an ID and whole body picture.

Free Guaranteed Delivery

A medical professional will review your answers to the online medical consultation and determine if it’s safe to prescribe and what treatments are available.

Alli General Information

How effective is Alli for weight loss?

Alli's effectiveness in promoting weight loss has been scientifically proven. As an over-the-counter version of the prescription drug orlistat, it works by inhibiting fat absorption in the body. Patients using Alli are able to expect to lose an additional 1kg for every 2kg lost through dieting alone, as explained by Clinical dietitian, Dr Sarah Brewer. The estimated weight loss indicates a substantial benefit to those seeking assistance in their weight loss journey. However, effectiveness varies among individuals and is significantly influenced by adherence to a low-fat diet and regular physical activity.

Alli weight loss reviews before and after

Reviews for Alli often exhibit significant weight loss transformations. It is common for users to report noticeable weight loss results within just a few weeks. 60% of Alli users reported achieving their target weight loss within six months of regular use, according to a 2022 survey. While these reviews reflect the potential of Alli, individual results vary depending on factors such as diet, exercise and initial weight.

Alli Results After Two Weeks

Alli often starts to show results within the first two weeks. These early results typically manifest as a reduction in weight, often accompanied by a noticeable decrease in waist circumference. The early response is motivating for users, encouraging adherence to healthy habits and the continued use of Alli, as explained by dietitian Dr Carrie Ruxton. Remember that everyone's body responds differently to weight loss supplements, and it's important to have realistic expectations and patience throughout the process.

Alli Dosage & Usage

How much Alli to take (dosage)?

The standard dosage of Alli is one 60mg capsule three times a day with meals containing fat. It is important to take Alli with meals to maximise its efficacy, as emphasised by Nutritionist Dr. Marilyn Glenville, Alli works by reducing fat absorption in the gut, therefore taking it with meals ensures it works effectively on the dietary fat consumed. The maximum dose of Alli must not exceed three capsules a day unless advised otherwise by a healthcare professional.

How much weight will I lose in a week on Alli?

On average, individuals expect to lose 1-2 pounds per week when combined with a low-fat diet and exercise. However, the weight loss associated with Alli varies widely among individuals. The range reflects the average weekly weight loss in most clinical trials with Alli, as explained by Dr Sarah Brewer. It is important to note that weight loss might not be consistent from week to week and individual results depend on factors such as dietary intake and physical activity levels.

When should you not take Alli?

Alli is not suitable for everyone, it is not recommended for those who are pregnant, breastfeeding, or have a BMI below 28. Furthermore, people with malabsorption issues or those on certain medications, like cyclosporine or levothyroxine, must avoid Alli due to potential drug interactions and side effects, as explained by Dr Megan Rossi. It's crucial to consult with a healthcare professional before starting any new medication, including Alli, to ensure it is safe and suitable for each individual's specific health circumstances.

How long does Alli last?

The effects of Alli are expected to last for up to several hours following ingestion. Alli works locally in the stomach and small intestine for about two to four hours after consumption, as highlighted by Dr Carrie Ruxton. However, its impact on weight loss is longer-lasting, particularly when paired with a balanced diet and regular exercise.

How long does Alli take to work?

The onset of Alli's effects is typically within 24 to 48 hours of the first dose. However, weight loss usually takes longer to become noticeable. Initial weight loss is observed within two weeks, but significant results usually require two to three months, as advised by Dr Sarah Brewer. It's important to maintain a balanced diet and regular exercise regimen for Alli to work effectively.

How long do I need to take Alli for?

Alli is typically taken for at least 1 to 3 months and up to 6 months to a year, as recommended by a doctor. The duration of Alli usage varies among individuals and depends on the weight loss goal. If weight loss is not achieved after 12 weeks of Alli use, it is recommended to discontinue use and consult a healthcare professional. It's essential to remember that Alli is designed to complement a low-fat diet and regular exercise, not replace them. Long-term success in weight management requires consistent adherence to a healthy lifestyle.

Alli Availability & Pricing

Is Alli available in the UK?

Yes, Alli is available in the UK. It was approved for over-the-counter sale by the Medicines and Healthcare Products Regulatory Agency (MHRA) in 2009. Today, it remains a popular choice for individuals seeking weight management assistance. Alli has proven to be an accessible and effective weight loss aid for many in the UK, as explained by pharmacist Kevin Noble.

Cheapest place to buy Alli

The cost of Alli varies significantly depending on where it's purchased. Supermarkets, pharmacies, and online retailers all offer varying prices. It's recommended to compare prices across several trusted platforms to find the most affordable option. While price is important, consider the credibility and customer service of the seller, as advised by Dr Kevin Noble.

Can I buy Alli online?

Yes, Alli is available for purchase online from various reputable pharmacies and retailers. It's essential to ensure that the chosen retailer is reputable to avoid counterfeit products. Online purchases, while convenient, require careful scrutiny to ensure the safety and quality of products, as highlighted by Dr Marilyn Glenville.

Can I get Alli over the counter?

Yes, Alli is available over the counter without a prescription. It was the first weight loss drug to receive approval for over-the-counter sale by the MHRA. The over-the-counter availability has made Alli a popular option for many seeking assistance with weight management, as explained by As Dr Sarah Brewer.

Does Holland and Barrett sell Alli?

No, while Holland and Barrett stock a wide range of health and wellness products, they do not currently stock Alli. It's always wise to check with individual retailers for their latest stock and product availability, as explained by Dr Megan Rossi.

Alli Side Effects & Considerations

What to do if you get Alli side effects

If Alli side effects occur, it's important to assess their severity and if concerned contact a doctor. Mild side effects such as minor stomach discomfort or changes in bowel habits are manageable. However, if these side effects persist or become severe, Dr Carrie Ruxton advises discontinuing use and consulting a healthcare professional immediately.

Alternatives & Related Treatments

Alli Vs Xenical

Alli and Xenical contain the same active ingredient, orlistat, but in different doses. Alli contains 60mg of orlistat and is available over the counter, while Xenical contains 120mg and requires a prescription. Both are considered effective for weight loss, but a healthcare professional is able to advise on the most suitable option, as clarified by Dr Justine Hextall.

Alli Vs Orlistat

Alli is the brand name of the generic drug Orlistat. Both Alli and Orlistat work in the same way and have similar effectiveness, as explained by Dr Marilyn Glenville, the choice between them often comes down to price and availability.

Alli Vs Saxenda

Alli and Saxenda are both weight loss aids, but they work differently. While Alli blocks fat absorption in the gut, Saxenda is a prescription injection that regulates appetite. Saxenda is often used when diet and exercise have failed and carries a higher risk of side effects, as noted by Dr Sarah Brewer. A healthcare professional provides guidance on the best treatment option based on individual health status and weight loss goals.

Alli FAQ's

What are Alli horror stories?

'Alli horror stories' typically refer to the experiences of users who've had significant side effects or didn't achieve the desired weight loss. Some people report severe gastrointestinal symptoms, while others might not have lost weight despite adhering to the recommended low-fat diet and exercise. Like all medications, Alli is not without potential side effects. The side effect might be mitigated by following the recommended low-fat diet.

Can I take 2 Alli instead of 1 xenical?

No, while Alli and Xenical both contain the active ingredient orlistat, they have different doses. Xenical contains 120mg of orlistat, while Alli contains 60mg. Although taking two Alli tablets potentially provides a similar dose of orlistat as one Xenical tablet, it is not recommended. It's important to only take the recommended dose of any medication, including Alli, as explained by Dr Sarah Brewer. Always follow the dosage instructions given by the manufacturer or healthcare provider.

What medication stops fat absorption?

Alli, known by its generic name orlistat, is a medication that stops fat absorption. It works by inhibiting the action of lipases, enzymes in the digestive tract that break down dietary fats into smaller molecules that are absorbed by the body. By inhibiting lipase action, Alli reduces the amount of dietary fat that the body absorbs, thereby reducing calorie intake and promoting weight loss. It's crucial to note that Alli must be used in conjunction with a balanced, reduced-fat diet to manage potential gastrointestinal side effects and support overall health.

Buy Alli Online

Please note the information below is intended for general knowledge, please read the patient information leaflet and/or the information provided by a healthcare professional for more specific guidance. This information should not substitute medical advice.

You can buy Alli online from our UK-registered online pharmacy partners. Complete an online consultation form and our system will show you if you are eligible to purchase Alli online. Our pharmacists will then review your order of Alli and dispatch it discreetly to your address.

How to buy Alli online?

You can buy Alli by following the following steps.

  1. Fill out our online consultation form
  2. If you are eligible to purchase Alli you will be shown it as one of your treatment options
  3. Pay online and receive your order to the comfort of your chosen address

Can I get Alli on the NHS?

Whether or not you can get Alli on the NHS is dependent on your local guidelines and eligibility status. It is best to contact your local GP service if you are unsure of whether you can get Alli from the NHS.

Can you get Alli over the counter?

No, you can’t get Alli over the counter without a prescription or consultation. Alli is a regulated medication so all purchases need to have a prescription and/or suitable consultation form completed.

Can I buy Alli online even if I have never taken it before?

A prescribing pharmacist will need to review your consultation form before the medication can be dispatched. One of our partner prescribing pharmacists will review the consultation form and will decide if you are eligible to buy Alli.

Is Alli safe?

If you have been prescribed Alli then it is at the discretion of the prescriber.

However, all medications can potentially have adverse effects and should be taken exactly as prescribed. If you experience any side effects when taking Alli then you should contact a doctor immediately.

Are there any foods that should be avoided when taking Alli?

We recommend you read the patient information leaflet for this product thoroughly before taking the treatment. This is essential to understanding any interactions that can occur and to take the medication safely.

Can I buy Alli from Boots?

It is generally possible to purchase medication, including Alli, from UK pharmacies like Boots. However, I recommend checking the Boots website or contacting Boots directly for the most current and accurate information. Remember to consult with a healthcare professional before starting any new medication.

Can I buy Alli from Superdrug?

If you would like to buy Alli, you will need to check availability on the Superdrug website.

Can I buy Alli from Amazon?

Amazon does not sell medication such as Alli, as they are not a pharmacy service provider. Always check with Amazon to see what they sell.

How long does Alli take to work?

The time it takes for a Alli to work can vary greatly depending on several factors, such as the stren