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  • What is Xenical?

    Xenical is a prescription-only weight loss medication that helps people suffering from obesity to lose weight when dieting and exercise alone have been unsuccessful. Xenical pills can be prescribed for patients who have a body mass index (BMI) of 30 or over, or 28 or over if there are other risk factors present, such as heart disease, diabetes or smoking.

    Xenical 120mg capsules contain the active ingredient orlistat, which prevents around a third of the fat you eat from being absorbed into your body. The medication was first developed by Roche and became available in 1998. It has since been used safely for over 25 years to provide support with weight loss for those who struggle with their weight.

    You take one Xenical 120mg capsule up to three times daily, with or up to one hour after each main meal. If you eat a fat-free meal, skip a meal or have a small snack instead, you do not need to take Xenical, as there will be no fat to absorb. 

    How do Xenical Capsules work?

    Xenical uses the active ingredient orlistat, which works to aid weight loss by blocking the enzymes in your gut that digest fat. Orlistat blocks around a third of the fat you consume from being absorbed. This fat is then passed out with your stools.

    We know the path to weight loss isn't just about taking a pill; it's a whole lifestyle change. That's why Xenical offers the best results when complemented by a balanced diet and regular physical activity—because you deserve comprehensive care. However, you do not need to take a dose of Xenical if there is no fat contained within your food.

  •  

    Type of medicineWeight loss medication
    Works byBlocking the enzymes in your gut that digest fat
    Active ingredientOrlistat
    Effective within 24 hours
    Pack size84
    Strength120mg
    Common side effects Oily stools, bloating, abdominal pains
    GenericNo
    Use with alcohol

    No known side effects

  • Xenical side effects

    We understand that experiencing side effects can be concerning and frustrating. If you do notice any adverse effects while taking Xenical, such as:

    • Constipation
    • The urgent need to open the bowels
    • Abdominal pains
    • Bloating or wind
    • Oily, fatty, orange or liquid stools

    These potential side effects are most common at the start of treatment and are most likely to occur after eating a high-fat meal. You should try to restrict your intake of dietary fat to less than 15 – 20g per main meal to decrease the chances of these side effects.

    If you experience any adverse effects from taking your prescribed medicine, it is really important to let us know immediately. Please log in to your online account and message one of our healthcare professionals or alternatively call us on 0141 123 1224.

    In a medical emergency, you should contact the emergency services or go straight to your local Accident & Emergency.

  • How to take Xenical

    Take 1 capsule (120mg) up to 3 times daily. Xenical should be taken immediately before or up to one hour after meals.

    If you have a low-fat meal or skip the main meal, there is no need to take Xenical; it only works when you have eaten a meal containing dietary fat.

    Your doctor will discontinue the weight loss treatment with Xenical after 12 weeks if you have not lost at least 5% of your body weight, as measured at the start of treatment with Xenical.

  • Patient information leaflet: https://www.medicines.org.uk/emc/files/pil.2592.pdf

Frequently asked questions
  • What is Xenical and how does it work?

    Xenical is a prescription weight loss medication containing orlistat, which blocks the enzymes that digest fat, helping you lose weight. It prevents about one-third of the fat you eat from being absorbed by your body.

  • Who can use Xenical and how often should it be taken?

    Xenical is suitable for adults with a BMI of 30 or higher, or 28 or higher if there are other risk factors. It's taken as one 120mg capsule up to three times daily, ideally with meals containing fat.

  • What are the common side effects of Xenical?

    Common side effects include oily stools, bloating, abdominal pains, and an urgent need to open the bowels. These are most likely to occur after eating a high-fat meal and can be managed by limiting fat intake.

  • How long does it take to see results with Xenical?

    Xenical starts working within 24 hours and can lead to significant weight loss when combined with a balanced diet and regular exercise. Your doctor may discontinue treatment if you haven't lost at least 5% of your body weight after 12 weeks.

  • Can Xenical be used with alcohol?

    There are no known interactions between Xenical and alcohol. However, it's essential to maintain a healthy lifestyle while taking Xenical for optimal results.

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