Orlistat

What is Orlistat?

Orlistat is a trusted and licensed first-line weight loss treatment that works by blocking fat absorption in the digestive system. Unlike other medications that affect your mood or appetite, Orlistat capsules work locally in your gut to prevent some fats from being digested, allowing them to pass through your body instead.

Taking Orlistat is especially suitable if you’re looking to lose weight steadily and sustainably, rather than through dramatic, short-term diets. The medication also supports healthy eating habits by encouraging you to be more mindful of fat intake, since eating high-fat meals while taking Orlistat can cause side effects. Orlistat is also available under the brand name Xenical, which contains the same active ingredient and offers the same clinical strength.

For optimal weight loss results, Orlistat capsules should be taken in conjunction with a lower-calorie, reduced-fat diet. This is because major clinical trials combined Orlistat with lifestyle changes (such as in the XENDOS study), and evidence consistently shows that combining weight-loss medication with healthy eating and exercise leads to greater weight loss than using either approach alone.

Both Orlistat and Xenical are available on prescription as 120 mg capsules. Orlistat is also available over the counter as Alli, which contains 60 mg of the active ingredient.

How Does Orlistat Work for Weight Loss?

Orlistat weight loss capsules work by blocking an enzyme called lipase, which is necessary for breaking down dietary fat into absorbable molecules. When active, the medication prevents around 30% of the fat you eat from being digested. This results in fewer calories being absorbed per meal, without needing drastic cuts in the volume of food you eat.

To take effect, orlistat binds to lipase enzymes in your gut, stopping them from breaking down some of the fat in your food. Because this fat isn't broken down, it can't be absorbed and instead passes out of your body in your stools.

Unlike weight loss treatments such as Mounjaro and Wegovy, which mimic naturally occurring hormones in the brain, Orlistat targets only the digestive system, earning it the classification of a ‘peripherally acting anti-obesity agent’. This may appeal to people who prefer a treatment that acts locally in the gut rather than one that affects appetite signalling in the brain.

Does Orlistat Burn Existing Fat?

No, Orlistat does not burn existing fat in the body. Instead, it works by binding to lipase enzymes, preventing them from breaking down certain dietary fats in meals. Unabsorbed fat is excreted from the body as waste. This process reduces the number of calories absorbed from food, thereby helping you use existing fat for energy.

How Long Does Orlistat Take to Work?

Although Orlistat weight loss capsules can take effect in as little as 24 to 48 hours, it may be a few weeks before you notice subtle changes in your weight. This is provided the medication is taken alongside a calorie-controlled diet. More significant results tend to build over 8 to 12 weeks when taken consistently with each fat-containing meal.

Some promising signs that the medication is working include feeling lighter, feeling less bloated, or having slightly looser clothing. These can occur early on in treatment, giving you the confidence you need to progress with your journey. Remember, though, that products like Orlistat are not designed to be fast-acting solutions; instead, they generate sustained, long-lasting results.

Orlistat Results: How Effective is Orlistat?

Orlistat’s effectiveness for weight loss has been extensively studied. A four-year trial found that nearly half (41%) of Orlistat users lost 10% or more of their starting body weight within one year of taking the medication, compared to just 21% of those using a placebo. Some 60% of participants experienced a drop of 5% or more within 12 weeks alone.

Meanwhile, pooled results from several two-year studies revealed that the average weight-loss difference between people taking Orlistat capsules and those not taking them was approximately 3.2 kg in the first 12 months of treatment. The majority of trials were randomised, double-blind, placebo-controlled experiments, meaning neither the participants nor the researchers knew who received Orlistat and who received a placebo. This is known as the ‘gold standard’ in clinical research.

An added benefit of Orlistat was found in people with impaired glucose tolerance, a prediabetic condition. Those using the medication were 10 percentage points less likely (18.8% vs 28.8%) to develop type 2 diabetes over a four-year period than individuals taking a placebo.

How Much Weight Can You Lose with Orlistat in a Month?

Clinical trials suggest that with consistent use and a suitable diet, taking Orlistat 120 mg capsules can lead to a weight loss of 1-2 kg in the first month. Everyone’s body reacts differently to medication, so you may find that your own experience is slightly different.

Over 3 to 6 months, most Orlistat users can expect to lose 5-10% of their initial body weight. This timeframe is crucial, as the 3-month mark is typically when your progress will be assessed to determine whether the treatment is right for you. A drop of at least 5% means that the medication is suitable.

Orlistat Criteria for Use

To be eligible for Orlistat, you must fulfil the following criteria:

• Be over 18 years old
• Have a BMI of 30 or more, or 28+ with conditions such as high blood pressure or type 2 diabetes
• Not pregnant or breastfeeding
• Not have chronic malabsorption issues or cholestasis (a liver condition)

Since Orlistat is a prescription weight loss treatment, it can only be provided after completing a medical questionnaire. This is to determine whether the medication is suitable for your unique circumstances.

How to Take Orlistat

Orlistat comes in 120 mg capsules to be taken with meals. Be sure to swallow the capsule whole, without breaking it open. Since orlistat only works when dietary fat is present in meals, it’s not necessary to use the medication when eating an entirely fat-free meal, as doing so could result in you experiencing side effects.

Ensure your diet is nutritionally balanced, with around 30% of calories coming from fat. You should also aim to reduce your intake of high-fat foods, such as fried items, full-fat dairy, and fatty cuts of meat.

What Happens if You Take Orlistat Without Eating?

If you miss a meal or eat a meal that contains no fat, omit the Orlistat dose. Taking a capsule would provide no additional benefit because there is no dietary fat for the medication to act on.

Orlistat only works when fat is present in a meal, so taking it without food shouldn't cause problems. To get the best results, take each capsule with a meal that contains a small to moderate amount of fat, such as lean proteins or healthy oils.

Orlistat Dosage Information

The standard dose of Orlistat is one 120 mg capsule, taken up to 3 times per day with water. It should ideally be taken with each main meal (usually breakfast, lunch, and dinner) that contains dietary fat, although it’s also possible to take the medication up to 1 hour afterwards.

Xenical (branded orlistat) also comes in 120 mg doses, while Alli is available in 60 mg form.

What if I Miss a Dose of Orlistat?

If you miss a dose of Orlistat, skip the missed dose and take a capsule as usual with your next fat-containing meal. Don’t double up to compensate, or use the medication without food, as it won’t boost effectiveness and may cause uncomfortable side effects. Should you continue to forget your Orlistat dose, consult our clinicians for advice.

If You Take Too Much Orlistat

If you take more Orlistat capsules than you should, or if somebody else accidentally takes your medication, seek medical attention immediately or visit your nearest accident and emergency department.

How Long Should I Take Orlistat For?

Most people take Orlistat capsules for an initial period of 12 weeks. This allows enough time to assess whether the medication is effective for you. If you’ve achieved weight loss of at least 5% of your starting body weight, your clinician may advise you to continue treatment.

For many people, Orlistat becomes part of a longer-term weight management strategy. It is considered safe for up to 1 year of use, though this timeframe can be extended further, provided you’re seeing continued benefits and not experiencing side effects. Regular check-ins with your prescriber can help you track your progress and ensure the medication continues to support your weight loss goals.

Orlistat Side Effects

Although Orlistat is generally well-tolerated, it can cause side effects. This is especially the case when it’s consumed alongside excessive amounts of fat. Here are the main Orlistat side effects to be aware of:

The above is not an exhaustive list of Orlistat side effects. More information can be found within the Patient Information Leaflet that’s included with the medication.

How to Manage Orlistat Side Effects

Most Orlistat side effects settle once your body adjusts, or if you reduce your fat intake. Common issues, such as oily stools and excess gas, tend to ease off after a few days or weeks, especially if you stick to a lower-fat diet.

To minimise side effects, try spreading your fat intake evenly across meals and avoiding greasy or fried foods. Drinking plenty of water, eating more fibre, and choosing lean protein sources can also help regulate digestion. If these symptoms persist or worsen, consult your clinician.

Orlistat Warnings and Interactions

Although Orlistat capsules are an effective weight loss treatment, they may not be suitable for everyone.

Avoid Orlistat if you:

• Have cholestasis (a liver condition) or chronic malabsorption syndrome
• Are allergic to any ingredients in the capsule
• Are under 18 years old
• Have a diagnosed eating disorder

It’s essential to inform your clinicians about any other medications you’re taking, including over-the-counter treatments and herbal remedies. This is so they can accurately determine whether Orlistat meets your requirements.

Does Orlistat Interact with Other Medications?

Yes, it’s possible for Orlistat to interact with other medications and affect the way they work. This is why it’s essential to provide a full list of any other treatments you are taking before starting on Orlistat. Potential interactions can occur with:

• Levothyroxine or iodine salts
• Ciclosporin
• Warfarin or other anticoagulants
• HIV treatments
• Amiodarone
• Anti-anxiety treatments
• Antidepressants
• Antipsychotic medication
• Acarbose
• Antiepileptic medicines

Orlistat Precautions

Orlistat capsules are safe for most people, but there are a few things to keep in mind before and during treatment:

• If you're already taking medication for high cholesterol or diabetes, losing weight may change how well these work. Your clinician may need to adjust your dose.
• Following a balanced, reduced-fat diet gives the best results. Eating too much fat can worsen side effects.
• Oily or fatty stools are a normal sign that Orlistat is working, as it's caused by undigested fat leaving your body. Spreading your fat intake evenly across your three main meals can help keep this manageable.
• If you have chronic kidney disease, Orlistat has been linked to kidney stones. Let your clinician know if you have any existing kidney problems before starting treatment.
• Orlistat isn't suitable for children.

Orlistat and Contraceptives

Orlistat can cause severe diarrhoea in some people, and this can stop the contraceptive pill working properly. If this happens, it's recommended that you use an additional method of contraception, such as condoms, for at least 7 days after the diarrhoea has passed to make sure you stay protected. Outside of this, there's no other known interaction between Orlistat and hormonal contraception.

Where to Buy Orlistat Weight Loss Pills

You can buy Orlistat from trusted pharmacies in the UK. Since it’s a prescription-only treatment, you’ll either need to speak to a doctor or request it privately from a regulated and trusted online service such as Prescription Doctor. This is done by completing a health consultation to determine whether Orlistat capsules are right and safe for you.

Can I Buy Orlistat Online?

Yes, you can buy Orlistat online from Prescription Doctor through our fast, convenient weight loss consultation service. As a licensed provider, we offer discreet delivery and full clinical oversight, so you can be completely confident that you’re in safe hands.

Here’s how our process works:

• Health Questionnaire: Provide details of your medical history, including any existing health conditions or lifestyle factors that may affect treatment.
• Review: Our team of licensed clinicians and prescribers will assess your responses to determine whether Orlistat capsules are the right choice for you.
• Dispatch: If your order is approved, the medication will be issued in plain and discreet packaging. Anything accepted before 3pm on a weekday can also be eligible for next-day delivery.
• Check Up: Our clinicians will schedule regular follow-up appointments to ensure everything is optimised and working as it should.

Can You Buy Orlistat Over the Counter?

A lower-strength form of Orlistat is available over the counter under the brand name Alli, which contains 60 mg of Orlistat per capsule. However, Orlistat 120 mg capsules require a prescription and a clinical assessment, even when purchased online. The same is true when purchasing the branded version, Xenical.

Is Orlistat Available on the NHS?

Orlistat is available through the NHS and may be prescribed in primary care or through a specialist weight-management service. Eligibility and local prescribing arrangements can vary, but it is generally considered for people with a BMI of 30 or more, or 28 or more with associated weight-related risk factors. As a result, many people choose to buy Orlistat capsules online or via another private service for faster access.

What are the Alternatives to Orlistat?

There are several weight loss treatments available if you find that Orlistat isn’t suitable for you. Prescription Doctor is pleased to provide a range of medications, including injections and capsules. Some popular alternatives to Orlistat include:

• Mounjaro: A once-weekly injection containing the active ingredient tirzepatide. It can lead to a weight loss of up to 22.5% when used in conjunction with a healthy diet and exercise regimen.
• Wegovy: Helps to slow down the digestion of food, making you feel fuller for longer. With the active ingredient semaglutide, Wegovy is also a once-weekly subcutaneous injection.
• Nevolat: The generic form of Saxenda, Nevolat, is injected once per day and contains liraglutide as its active ingredient.
• Mysimba: A popular weight loss tablet, Mysimba contains both bupropion and naltrexone as active ingredients. They work together to make you feel less hungry.
• Wegovy Pills: An oral tablet that contains the same active ingredient as injectable Wegovy. It is the first GLP-1 tablet licensed for weight loss in the UK.

Frequently Asked Questions About Orlistat 120mg Capsules