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When should you tell your doctor about symptoms of Alli (orlistat)?

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Tell your doctor if you have any of the following symptoms and they become severe or do not go away:

  • Difficulty controlling bowel movements
  • Loose, frequent stools
  • Oily or fatty stools
  • Oily spots on undergarments
  • Stomach or rectum pain
  • Passing gas more often
  • Urgent need to have a bowel movement
  • Anxiety
  • Changes in your menstrual cycle

From: Alli: Everything You Need to Know WebMD Medical Reference

SOURCES: 

FDA : "Orlistat (marketed as Alli and Xenical): Labeling Change;" "Questions and Answers: Orlistat and Severe Liver Injury;" and "Orlistat (Alli) Packaging Label Insert." 

MedlinePlus: "Orlistat."

Reviewed by Melinda Ratini on March 8, 2018

SOURCES: 

FDA : "Orlistat (marketed as Alli and Xenical): Labeling Change;" "Questions and Answers: Orlistat and Severe Liver Injury;" and "Orlistat (Alli) Packaging Label Insert." 

MedlinePlus: "Orlistat."

Reviewed by Melinda Ratini on March 8, 2018

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When should you call 911 about side effects of Alli (orlistat)?

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THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

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