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Orlistat Weight Loss Tablets (120mg)
Orlistat Weight Loss Tablets (120mg) Product information
£29.99 (£0.36 per capsules)
| 120mg | |
|---|---|
| 84 capsules | £29.99 |
| 168 capsules | £58.94 |
| 252 capsules | £78.94 |
Buy Orlistat 120mg Weight Loss Capsules
Orlistat 120mg weight loss capsules are a prescription weight loss medication which can help support overall weight loss. It works by reducing the amount of dietary fat absorbed by the body from food.
Our expert clinical team of pharmacists and independent doctors are here to offer safe and supported weight treatment and guidance.
Product Information for Orlistat Weight Loss Tablets (120mg)
Get to know Orlistat weight loss medication
Orlistat can be an effective weight treatment alongside a calorie-controlled diet and increased physical activity. The average weight loss with 12 months of treatment is up to 10%. It comes as a capsule.
Take one capsule 3 times a day (with each main meal)
Reduce dietary fat absorption by up to a third
From £34.98 for a monthly supply
Orlistat 120mg key facts
Orlistat 120mg capsules are licenced in the UK for weight loss and are most effective when used as part of a holistic healthy living approach. Taken 3 times a day (with each main meal), they’re available on prescription in packs of 84, 168 and 252 capsules.
The active ingredient is Orlistat, a lipase inhibitor, which binds the fat in your food and reduces how much is absorbed by the body. Because of this process, it’s recommended to take a daily multivitamin containing vitamins A, D, E, and K at least 2 hours before or after taking Orlistat.
Remember, always read the Patient Information Leaflet that comes with your medication.
How does Orlistat work for weight loss?
Orlistat works in the body by reducing the amount of fat your body absorbs from the food you eat.
This happens in your digestive system by inhibiting pancreatic and gastric lipases - the enzymes that break down fat. By binding to the fat in your food, Orlistat blocks these enzymes and prevents around 30% of the fat you consume from being absorbed by your body. This unabsorbed fat is then eliminated when you go to the toilet through your bowel movements.
It’s important to note that Orlistat doesn’t have any effect on existing fat cells and only works on the fat contained in the food you eat whilst taking the medication. However, because of reduced fat absorption, your body can use already stored fat for its energy needs, contributing to overall weight loss.
Studies have also shown that patients who made positive changes to their diet, lifestyle and activity levels experienced less weight gain once they stopped treatment.
Am I eligible for Orlistat 120mg?
Orlistat 120mg capsules are only available via prescription in the UK. You might be suitable if the criteria below apply to you, the doctor will complete a clinical review of your completed online assessment and let you know.
Adults aged 18 or over
Those with a BMI of 30 or higher
Those with a BMI of 28 or higher and a weight-related condition such as type 2 diabetes, high blood pressure, or high cholesterol
Remember, completing an online assessment or meeting the initial eligibility criteria doesn’t guarantee you’re suitable for treatment.
Use this NHS tool to calculate your BMI.
Weight loss results using Orlistat
Several studies have demonstrated the potential weight loss results achievable whilst using Orlistat as part of a holistic weight loss plan.
The first 2 weeks
Once you start taking Orlistat, it gets to work fast and will start binding the fat from your food intake within 1-2 days. You may also start to notice weight loss results within 2 weeks of starting treatment.
The first 3 months
Most people can expect to lose up to 5% of their starting body weight during the first 3 months of treatment. If your weight loss is slower than this, let us know.
Months 6-12
After 6-12 months of treatment, the average weight loss supported by Orlistat to be expected is around 10% or more. Individual weight loss will depend on a range of factors, including changes to diet, lifestyle and exercise.
Special dietary instructions
Because Orlistat works by binding to - and then expelling via bowel movements - up to 30% of the fat in the foods that you eat, you should reduce your fat intake to 30% of your total calorie intake.
Distributing your fat intake evenly across your 3 main meals can also help reduce digestive side effects. Consuming meals with very high fat content while taking Orlistat can increase the likelihood of gastrointestinal side effects.
Explore more about what to eat whilst taking Orlistat in our FAQs below and in our dedicated blog, Weight loss – getting the best results from Orlistat.
Orlistat Weight Loss Tablets (120mg) reviews
How to use Orlistat Weight Loss Tablets (120mg)
Orlistat 120mg capsules are a prescription-only medication and should always be taken as directed. You should always read the Patient Information Leaflet that comes with your medication.
How to take Orlistat
The usual recommended dose of Orlistat 120mg is one capsule 3 times a day before, during or up to one hour after each main meal. This means you will usually take one capsule with breakfast, one capsule with lunch and one capsule with dinner.
The capsule should be swallowed whole with a glass of water.
Alongside treatment, aim for a well-balanced diet where fewer than 30% of calories come from fats. Avoid foods containing fat such as savoury snacks, chocolate and biscuits, between meals.|
Do not exceed 15g of fat per meal while taking Orlistat, as eating more than this can increase the risk of stomach upset, oily stools, and diarrhoea.
How long does Orlistat take to work?
Orlistat capsules normally take 24-48 hours to start working.
If you take Orlistat as directed, you can expect to see weight loss results within a few weeks of starting treatment.
How long does Orlistat stay in your system?
The presence of Orlistat in your system is influenced by your digestive tract and bowel transit time, usually lasting for 12 - 72 hours. Various sources have indicated that after discontinuing Orlistat, faecal fat levels return to their pre-Orlistat levels within 48 - 72 hours.
Side effects of Orlistat Weight Loss Tablets (120mg)
Below we’ve listed some of the ‘Very common’ and ‘Common’ side effects of Orlistat 120mg capsules. You should always read the Patient Information Leaflet that comes with your medication. A copy of this will also be in the medication packaging or box.
Very common side effects (may affect more than 1 in 10 people)
Headache
Upper respiratory tract infection
Abdominal pain/discomfort
Oily or fatty stools
liquid stools
Increased elimination of stools
Urgent or increased need to open the bowels
Flatulence (wind)
Flatulence (wind) with discharge
Oily discharge
Influenza (‘flu’)
Low blood sugar levels
Common side effects (may affect up to 1 in 10 people)
Lower respiratory tract infection
Rectal pain/discomfort
Soft stools
Urinary tract infection
Irregularity of menstrual cycle
Tiredness
Inability to control your bowel movements
Bloating
Tooth/gum disorder
Anxiety
If you would like to talk to our Healthcare Advisors about any concerns around side-effects please call us on 01295 262925 or email help@oxfordop.co.uk.
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You shouldn’t take Orlistat alongside any other weight loss medications, including, but not limited to, Mounjaro, Wegovy, Ozempic and Mysimba. Doing this won’t lead to a greater weight loss and could lead to serious side effects.
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You shouldn’t take Orlistat if you are allergic to any of its ingredients, have chronic malabsorption syndrome, have cholestasis (liver disorder) or are pregnant or breastfeeding.
It may also affect the activity of medications such as oral contraceptives, anticoagulant drugs, ciclosporin, levothyroxine, amiodarone, medicines to treat HIV and those for depression, anxiousness or psychiatric disorders. Always tell us which medications you’re taking during your online consultation.
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Orlistat 120mg capsules are only available on prescription; however, you can get Orlistat in a lower strength (60mg) over the counter without a prescription. These are sold under the brand names Orlos and Alli.
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Even though this medicine reduces the amount of fat your body absorbs by up to 30%, it doesn’t stop all of it. This means you need to work with the medicine and eat the right things.
So, choose a low-fat diet with moderate to high carbs, moderate protein, and low fat. This diet comprises of lean meats, beans, grains, fruits, vegetables, and fat-free products such as low-fat dairy.
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Yes, exercise is so important. The key is to find the types of exercises that you enjoy and compliments your lifestyle. There are many ways you can incorporate exercise into your life, from taking a brisk walk to doing a 15-minute HIIT (high intensity) workout.
Often underestimated as an exercise, brisk walking contributes significantly to your health by burning extra calories and boosting your fitness level. There's no need for extended walking sessions. Just a brisk 10-minute walk each day can produce many health rewards while contributing to the recommended 150 minutes of weekly exercise for adults aged 19 to 64, as per the NHS physical activity guidelines.
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Orlistat works in the gastrointestinal tract (gut) and does not alter the central nervous system (brain). If you are looking for a treatment that stops you from feeling hungry or produces the feeling of fullness, you can consider Mounjaro or Wegovy injections, or Mysimba tablets.
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You may notice changes in bowel movements around 24-72 hours after taking Orlistat. This includes more frequent bowel movements or the urgent need to pass a stool.
If you have a diet high in fat, you may also notice the need to go to the toilet more. This is because there will be more fat for Orlistat to bind to and then expel from the body. Aim for a low-fat diet to minimise side effects like increased bowel movements.
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Taking more than the recommended dose of 120mg (1 capsule) has no additional benefit. You should follow a nutritionally balanced, low-calorie diet that contains no more than 30% fat.
If you miss a meal, you can skip the Orlistat dose. If you miss a dose of Orlistat and it is more than 2 hours after the fat-containing meal, you can skip that dose because most of the fat absorption has already occurred.
Because Orlistat reduces fat-soluble vitamin absorption, you should take a multivitamin (which contain fat-soluble vitamins) daily. Multivitamin supplements should be taken at least two hours after you’ve taken your Orlistat.
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Orlistat 120mg capsules can be taken long-term under the supervision of a doctor. If you don’t lose at least 5% of your starting body weight in the first 3 months of use, we may advise that you stop your treatment with Orlistat and look at other options.
If you are taking the over-the-counter 60mg Orlistat capsules, these should only be taken for a maximum of 6 months.
Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)
Orlistat Weight Loss Tablets (120mg) - Patient Information Leaflet
Healthy Weight Loss In Depth - Mayo Clinic
Orlistat-associated adverse effects and drug interactions: a critical review - PubMed - Theodosios D Filippatos 1, Christos S Derdemezis, Irene F Gazi, Eleni S Nakou, Dimitri P Mikhailidis, Moses S Elisaf
Weight Loss Medicine - Patient Info - Authored by Dr Laurence Knott
Obesity Treatment - NHS
How to use Orlistat 120 Mg Capsule Fat Absorption Decreasing Agents - WebMD
Dietary advice for patients taking orlistat -NHS Department of Nutrition and Dietetics
Pharmacotherapy. Author manuscript; available in PMC 2018 Sep 19. Published in final edited form as: Pharmacotherapy. 2000 Mar; 20(3): 270–279, Orlistat, a New Lipase Inhibitor for the Management of Obesity, Dr. Amy M. Heck, Pharm.D., Dr. Jack A. Yanovski, M.D., Ph.D., and Dr. Karim Anton Calis, Pharm.D., M.P.H., FASHP
Indian J Endocrinol Metab. 2011 Apr-Jun; 15(2): 99–104., doi: 10.4103/2230-8210.81938, Evaluation of efficacy and safety of orlistat in obese patients, Suyog S. Jain, Sunita J. Ramanand, Jaiprakash B. Ramanand,1 Pramod B. Akat, Milind H. Patwardhan,2 and Sachin R. Joshi
Flushing away the fat - PMC
XENICAL, INN-orlistat - EMA
Mounjaro and orlistat Interactions Checker - Drugs.com
Orlistat - StatPearls - NCBI Bookshelf
Orlistat (Weight Loss Medicine): Uses and Side-Effects - Patient.info
Rössner S, Sjöström L, Noack R, Meinders AE, Noseda G. Weight Loss, Weight Maintenance, and Improved Cardiovascular Risk Factors after 2 Years Treatment with Orlistat for Obesity. Obesity Research. 2000 Jan;8(1):49–61.
McDuffie JR, Calis KA, Booth SL, Uwaifo GI, Yanovski JA. Effects of Orlistat on Fat-Soluble Vitamins in Obese Adolescents. Pharmacotherapy. 2002 Jul;22(7):814–22.
We recommend taking a multivitamin alongside your weight loss medication to ensure you get the necessary nutrients to support healthy weight loss. You can get Centrum Advanced multivitamin tablets here.
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Authored on February 10, 2026
Robert Bradshaw (Pharmacist) - MRPharms BSc(Hons) Pharmacy
Superintendent Pharmacist
GPhC Number: 2036118
Reviewed on February 10, 2026