Xenical and generic orlistat 120mg contain the same active ingredient (orlistat 120mg) and work in exactly the same way. The main differences are:

Xenical is the original branded version manufactured by Roche.

Generic orlistat 120mg is produced by various pharmaceutical companies and is typically less expensive than the branded version.

Both are prescription-strength medications that block approximately one-third (33%) of dietary fat absorption. The choice between Xenical and generic orlistat often comes down to personal preference and budget.

Xenical works in a completely different way to injectable weight loss treatments like Wegovy and Mounjaro:

Xenical is an oral capsule taken three times daily with meals. It works in the digestive system by blocking fat absorption, preventing approximately one-third of dietary fat from being absorbed. It does not affect appetite or hormones.

Wegovy and Mounjaro are weekly injections that work by mimicking hormones (GLP-1 and GIP) to reduce appetite, increase feelings of fullness, and regulate blood sugar levels.

Xenical is generally more affordable and may be suitable for people who prefer oral medication or cannot use injectable treatments.

Xenical works by blocking fat absorption, so it is most effective when your diet contains some fat. If your meals contain very little or no fat, Xenical will have minimal effect on weight loss.

For best results, follow a reduced-calorie diet that includes moderate amounts of fat (no more than 30% of daily calories from fat, approximately 15g per meal). This allows Xenical to work effectively while minimizing digestive side effects.

If you already follow a very low-fat diet, alternative weight loss treatments may be more suitable. Speak to your prescriber for personalized advice.

Eating high-fat meals while taking Xenical significantly increases the likelihood and severity of digestive side effects, including:

• Oily or fatty stools
• Oily spotting or leakage
• Urgent need to use the toilet
• Increased bowel movements
• Flatulence with discharge
• Abdominal discomfort

To minimize side effects, aim to keep fat intake to no more than 15g per meal and distribute fat evenly across three meals rather than consuming a large amount in one sitting.

Xenical does not directly reduce the effectiveness of oral contraceptive pills. However, digestive side effects such as diarrhoea can reduce pill absorption.

If you experience severe diarrhoea lasting more than 24 hours, follow the "missed pill" guidance in your contraceptive leaflet and consider using additional barrier methods (such as condoms) until symptoms resolve and you have taken your pill correctly for 7 consecutive days.

Pregnancy: Xenical is not recommended during pregnancy. Weight loss during pregnancy is generally not advised, and there is limited data on the safety of Xenical in pregnancy.

If you become pregnant while taking Xenical, stop taking the medication and contact your doctor or prescriber for advice.

Breastfeeding: It is not known whether Xenical passes into breast milk. As a precaution, Xenical is not recommended while breastfeeding.

Yes. Because Xenical reduces fat absorption, it can also reduce the absorption of fat-soluble vitamins (A, D, E, and K).

It is recommended to take a daily multivitamin supplement containing these vitamins while using Xenical.

• Take the multivitamin at bedtime or at least 2 hours before or after taking Xenical
• This timing ensures the vitamins are properly absorbed

If you forget to take a dose of Xenical, it depends on the timing:

• If it has been less than one hour since your meal, take the missed dose as soon as you remember
• If it has been more than one hour since your meal, skip the missed dose and take your next dose with your next meal
• If you skipped a meal or ate a meal with no fat, you do not need to take that dose

Do not take a double dose to make up for a missed dose. Never take more than three capsules per day.

Most people begin to see weight loss within 2 weeks of starting Xenical when combined with a reduced-calorie, lower-fat diet and regular physical activity.

Weight loss typically continues over several months. On average, people taking Xenical lose 5-10% of their body weight over 6-12 months.

Your prescriber will review your progress after 12 weeks. If you have not lost at least 5% of your starting body weight by this point, they may recommend stopping Xenical and considering alternative approaches.

There is no direct interaction between Xenical and alcohol. However, alcohol contains calories that can hinder weight loss progress.

Alcoholic drinks can also be high in sugar and may increase appetite, making it harder to stick to a reduced-calorie diet.

If you choose to drink alcohol while taking Xenical, do so in moderation and account for the additional calories in your daily intake.

Xenical is a prescription-only medicine in the UK and can only be supplied following a clinical assessment by a qualified prescriber.

With OnlineUKPharmacy, you can request Xenical by completing a short online consultation. A UK-registered healthcare professional will review your information to confirm suitability. If approved, your medication will be supplied with discreet delivery and ongoing clinical support.

Xenical may interact with certain medications. Always inform your prescriber if you are taking:

• Warfarin or other blood thinners – Xenical may affect blood clotting
• Ciclosporin – take at least 2 hours apart from Xenical
• Levothyroxine (thyroid medication) – take at least 4 hours apart from Xenical
• Antiepileptic medicines – Xenical may reduce their effectiveness
• Antiretroviral medicines for HIV – Xenical may affect absorption
• Diabetes medications – blood sugar levels may improve with weight loss, requiring dose adjustments

Weight regain after stopping Xenical depends on whether you maintain the dietary and lifestyle changes you adopted during treatment.

Xenical is a tool to support weight loss, but long-term success requires ongoing commitment to:

• A balanced, reduced-calorie diet
• Regular physical activity
• Healthy eating habits and portion control

Many people successfully maintain their weight loss after stopping Xenical by continuing these healthy habits. Your prescriber can provide guidance on maintaining your weight loss long-term.

Yes, Xenical can be used by people with type 2 diabetes. In fact, weight loss can help improve blood sugar control and may reduce the need for diabetes medications.

If you have diabetes and take Xenical, your blood sugar levels should be monitored regularly, as weight loss may require adjustments to your diabetes medication doses.

Always inform your prescriber that you have diabetes before starting Xenical, and keep your diabetes care team informed of your weight loss progress.