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Quick summary

Type of medicine

Lipase Inhibitor


Yes, generic versions of Orlistat are available

Active Ingredient


Effective within

Within a few weeks.

Works by

Blocking fat absorption in the digestive system.

Side effects

Oily spotting, oily stools, flatulence, frequent bowel movements and stomach discomfort.

Medication details


Xenical 120mg is a medication that contains the active ingredient Orlistat. This medication is commonly used to aid weight loss in individuals who are overweight or obese. It works by blocking the absorption of fat in the digestive system, helping patients reduce their calorie intake and achieve their weight loss goals.


Xenical Cap 120mg (GB) should be taken as directed by your healthcare professional or according to the prescription label. Usually, it's recommended to take one capsule with each of the three main meals per day. It's essential to follow a reduced-calorie diet for optimal results. If you miss a meal or eat a meal without fat, skip the Xenical dose for that meal. Do not exceed the recommended dosage and consult your healthcare provider for personalised advice.


Xenical contains orlistat as its active ingredient, which is used primarily for weight loss and weight management. Orlistat works by inhibiting the absorption of dietary fats in the intestines, reducing the number of calories absorbed from meals. This action helps to promote weight loss when combined with a reduced-calorie diet. Xenical is taken orally and is particularly effective when used alongside a balanced, low-fat diet and regular physical activity.

Side Effects

Xenical Cap 120mg (GB) may cause side effects in some individuals. These side effects are usually mild and temporary. Common side effects may include:
Oily spotting: You may experience oily spotting from the rectum, which can be accompanied by an urgent need to have a bowel movement.
Oily stools: Some people may notice that their stools become oily, loose, or have an unusual appearance.
Flatulence: Increased flatulence or gas with an oily discharge may occur.
Frequent bowel movements: You may have more frequent bowel movements, especially during the initial days of treatment.
Stomach discomfort: Mild stomach discomfort or abdominal pain is another potential side effect.
In rare cases, individuals may experience more severe side effects, such as severe abdominal pain, severe diarrhea, or signs of liver problems. If you experience any of these severe side effects, stop taking Xenical and seek immediate medical attention.
It's essential to note that the above list of side effects is not exhaustive. If you experience any side effects not listed here or have concerns about the side effects, consult your healthcare provider.


Before using Xenical Cap 120mg (GB), it is crucial to consider the following warnings and precautions:
Allergies: Inform your healthcare provider of any allergies you have, especially if you are allergic to Orlistat or any other ingredients in the medication.
Pregnancy and breastfeeding: Xenical should not be used during pregnancy or while breastfeeding unless recommended by a healthcare professional.
Medical conditions: Discuss your medical history with your healthcare provider, particularly if you have a history of kidney stones, pancreatitis, gallbladder problems, or if you are taking any other medications.
Vitamin absorption: Xenical may affect the absorption of fat-soluble vitamins (A, D, E, K). It is advisable to take a daily multivitamin supplement containing these vitamins, as prescribed by your healthcare provider, to ensure you receive adequate nutrition.
Diet and exercise: Xenical is most effective when used in conjunction with a reduced-calorie diet and regular physical activity. Consult with a healthcare professional or dietitian to create a personalized weight loss plan.
Liver function: Regular monitoring of liver function is essential, as Xenical may rarely cause liver problems. Notify your healthcare provider of any unusual symptoms, such as dark urine, yellowing of the skin or eyes (jaundice), or persistent abdominal pain.
Children and elderly: The safety and effectiveness of Xenical in children under 12 and adults over 65 years of age have not been established. Consult with your healthcare provider for appropriate weight management strategies in these age groups.
Overdose: If you accidentally take more Xenical capsules than prescribed, seek immediate medical attention.

Medically reviewed and published

  • This page was medically reviewed by Dr Sohaib Imtiaz, Clinical Lead on Apr 18, 2024, 3:30 pm

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Please read our FAQs page to find out more.

How quickly can I expect to see results with Xenical Cap 120mg (GB)?

Xenical's effectiveness varies from person to person. Some individuals may begin to see weight loss within a few weeks of starting the medication, while others may take longer. The key to success with Xenical is consistency in taking the medication, following a reduced-calorie diet, and engaging in regular physical activity. It's essential to consult with your assigned clinician for personalised expectations and guidance.

Can I continue taking my other medications while using Xenical?

It's important to inform your healthcare provider about all the medications you are currently taking. While Xenical typically does not interact with most medications, it is essential to discuss any potential interactions with your healthcare provider. They can help you make any necessary adjustments to your medication regimen.

Can Xenical be used during pregnancy or breastfeeding?

Xenical is not recommended during pregnancy or breastfeeding. Consult with a healthcare professional for appropriate weight management options during these periods.

What should I do if I miss a dose of Xenical?

If you miss a dose of Xenical and your meal does not contain any fat, you can skip that particular dose. It's important not to double your dosage to make up for the missed dose. Simply resume your regular dosing schedule with your next meal containing fat. Always consult with your healthcare provider if you have concerns about missed doses.

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