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Alli Side Effects Center: Detailed Datasheet

Medically reviewed by Min Clinic Staff | Updated: January 2026

Alli (Orlistat 60 mg) side effects drug center

 

PROFESSIONAL

CONSUMER

SIDE EFFECTS

 

Alli Side Effects Center

What Is Alli?

Alli (orlistat) Capsules works by blocking absorption of 25% of the fat in a meal and is used for weight loss in overweight adults, 18 years and older, when used along with a reduced-calorie and low-fat diet.

What Are Side Effects of Alli?

Common side effects of Alli include:

  • changes in your bowel function because of the unabsorbed fat,
  • fatty/oily stool,
  • oily spotting in your undergarments,
  • orange or brown colored oil in your stool,
  • intestinal gas with discharge,
  • loose stools,
  • a feeling of needing to have a bowel movement right away,
  • increased number of bowel movements,
  • poor bowel control,
  • stomach pain,
  • nausea,
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