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Xenical is a medication used to help weight loss. It works by blocking some of the fat you eat, preventing it from being absorbed by your body. When used in combination with diet and exercise, it can help accelerate weight loss.

What is Xenical?

Xenical is a medicine used to treat obesity. Obesity is a condition whereby someone’s excessive weight presents a risk to their health. Obesity can cause several health problems, such as high blood pressure and cancer. In combination with regular exercise and a calorie-controlled diet, Xenical can help an obese person to lose weight.

Xenical 120mg capsules are available only on prescription. You must have a prescription in order to buy Xenical. Alternatively, we can prescribe it to you following a brief online consultation. Contact us to find out more.

The active ingredient in Xenical is orlistat. For more information, consult the patient information leaflet.

How it works

Xenical works by attaching to enzymes in your digestive system, blocking them from breaking down dietary fat. This stops around one third of the fat from the food you eat from being digested. This undigested fat is then removed by the body.

This medication will not be effective if you do not follow the nutrition plan set by your doctor. If you continue to eat a diet high in calories and fat, Xenical will not be effective.

Before you take it

Do not take this medication if you have an allergy to orlistat, or any of the other ingredients in this medication. A full list of ingredients may be found in the patient information leaflet. You must speak to your doctor to obtain advice as to how you can treat your obesity.

If you have a condition known as cholestasis, or you have chronic malabsorption syndrome, you must not take Xenical. Speak to your doctor to seek an alternative treatment.

Xenical is not suitable for breastfeeding or pregnant women.

Xenical may cause changes to your bowel habits. This is normal. You may experience oily or greasy stools, as undigested fat will be present in your stools. If you continue to eat a diet high in fat, this is made more likely.

Xenical may affect other medications. Ensure your doctor is fully aware of any other medications that you are taking, as your dosage may need to be adjusted.

Xenical can interact with certain other medications. You must consult your doctor or pharmacist before taking Xenical if you are taking any of the following:

  • Ciclosporin or other immune system suppressants
  • Amiodarone to treat arrhythmia
  • Anticoagulants, such as warfarin
  • Levothyroxine to treat hypothyroidism

This is not a complete list of warnings or interactions. For more information, you should read the patient information leaflet.

Dosage Instructions

Take Xenical exactly as your doctor has directed. Do not exceed the stated dose. If you are unsure of how to take Xenical, seek advice from your doctor or pharmacist.

The usual dose of Xenical is one 120mg capsule taken alongside each of your three daily meals. You may take it straight before, during or up to an hour after you have eaten.

Do not suck, crush or chew the capsule. Swallow it whole with plenty of water.

You must ensure you take Xenical in conjunction with a low-fat diet, rich in fruits and vegetables. Xenical will not be effective if you consume fatty foods, especially between meals, such as biscuits or savoury snacks.

If you miss a meal, or eat a meal that contains zero fat, you do not need to take Xenical.

Store Xenical in a cool, dry place, free from moisture and heat. Keep it out of reach of pets and children.

Common Side Effects of Xenical

Xenical can cause unwanted side effects. Usually these are no cause for concern, but if these side effects persist, you should consult a doctor. Side effects can include:

  • Oily or fatty stools
  • Abdominal pain
  • Low blood sugar
  • Flatulence
  • Liquid stools
  • Influenza

Xenical may also cause more rare side effects. If you experience these you must consult a doctor. Side effects may include:

  • Tooth or gum disorder
  • Urinary tract infections
  • Fatigue
  • Gallstones
  • Hepatitis
  • Changes to your menstrual periods
  • Rectal pain, discomfort or bleeding

Xenical can also cause a serious allergic reaction. This is not common, but an allergic reaction is an emergency, so if you believe you are experiencing one you must immediately seek medical advice. Symptoms can include:

  • Hives or nettle rash
  • Trouble breathing or speaking
  • Skin rash - bleeding, itching, redness, blistering
  • Swelling of the lips, tongue, face or throat

This is not an exhaustive list of side effects. For a complete list, consult the patient information leaflet. Frequently Asked Questions

Is Xenical suitable for children?

Xenical should not be taken by children. We do not prescribe any medication to anyone under the age of 18. You must consult your doctor to obtain a suitable weight loss plan for your child.

I’m pregnant. Can I take Xenical?

Do not take Xenical if you are pregnant - the effect it may have on an unborn baby is unknown.

What happens if I miss a dose?

If you forget to take Xenical, and it is within an hour of your previous meal, take it as soon as you remember. If it is not within one hour of your previous meal, skip the missed dose and take it as scheduled with your next meal.

What happens if I take too much?

If you have taken more Xenical than you should have, seek medical advice, as an overdose can cause increased side effects.

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