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Alli
  • Treatments
  • Obesity

alli

Generic name:orlistatOR-li-stat ]
Brand names: alli, Xenical
Drug class:Peripherally acting antiobesity agents

Medically reviewed by Sanjai Sinha, MD. Last updated on Jun 7, 2022.

What is alli?

alli blocks some of the fat that you eat, keeping it from being absorbed by your body.

alli is used to aid in weight loss, or to help reduce the risk of regaining weight already lost. This medicine must be used together with a reduced-calorie diet. Orlistat is for use only in adults.

Xenical is the prescription-strength form of orlistat. The alli brand of orlistat is available without a prescription.

Warnings

Do not take alli if you are pregnant. Weight loss is not recommended during pregnancy.

You should not use alli if you have a digestive disorder (problems absorbing food). Do not use alli if you have had an organ transplant, if you use cyclosporine, or if you are not overweight.

alli is only part of a complete program of treatment that also includes diet, exercise, and weight control. Your daily intake of fat, protein, and carbohydrates should be evenly divided over all of your daily meals. Follow your diet, medication, and exercise routines very closely.

Avoid a diet that is high in fat. High-fat meals taken in combination with orlistat can increase your risk of unpleasant side effects on your stomach or intestines.

Before taking this medicine

You should not use alli if you are allergic to orlistat, or if you have malabsorption syndrome (an inability to absorb food and nutrients properly).

You also should not use Xenical if you have:

  • gallbladder problems; or

  • if you are pregnant.

Do not use alli if:

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