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What is Xenical?

Xenical is a medicine that is used to treat obesity. It can be very difficult to lose weight. With a healthy diet and exercise, weight loss pills like Xenical, Orlistat or Alli can help you lose weight. When used alongside a calorie reduced diet, Xenical can help you lose 50% more weight than dieting alone.

The manufacturer recommends a fat intake of about 15 grams a meal. If you eat a meal that contains no fat, then you don’t need a dose of Alli. If the recommended intake of fat per meal is exceeded, you may experience abdominal pain and diarrhoea.

Xenical is the brand name version of the generic medicine Orlistat. They are medically equivalent as they contain the same active ingredient.

Do not store above 25°C
Maintain a reduced-calorie diet
Take a multivitamin daily

How does Xenical work?

Xenical prevents your body from absorbing some of the fat you consume.


Fat Absorption without Xenical

Fat is too large to be absorbed by our body

It is broken down by enzymes into smaller parts that our body can absorb

The smaller molecules are easily absorbed in our body


Fat Absorption with Xenical: only 50% of fat is absorbed by the body

When you take Xenical weight loss tablets with a well-balanced diet, it blocks some of the enzymes from breaking down the fat

Larger fat molecules can therefore not be absorbed by the body and are excreted



How do you take Xenical?

Always take Xenical exactly as it has been prescribed to you. The usual dose of 120 mg capsule taken with each of the three main meals per day. Xenical can be taken immediately before, during, or up to one hour after a meal. The capsule should be swallowed with water.

How effective is Xenical?

Xenical is an effective way of losing weight if you suffer from obesity. However, Xenical alone is not enough to help you lose weight. You need to be on a calorie-restricted diet. In addition, you should incorporate exercise into your life.

What are the main side effects of Xenical?

Like all medicines, Xenical can cause side effects, although not everybody gets them.


The most common side effects of Xenical are:

  • Headache
  • Abdominal pain or discomfort
  • Urgent of increased need to open the bowels


For additional side effects, please see the patient information leaflet.

* Disclaimer: Results and individual responses to treatments may vary from person to person. If you do need medical advice you should always speak to a doctor, pharmacist or appropriate medical professional.