Common side effects of Orlistat include Oily/fatty stools, Gas, Urgent bowel movements. Serious side effects include Liver damage (rare) and Kidney stones (oxalate). Orlistat is classified as Weight Loss. Always consult a doctor if side effects persist.

Side Effects GuideAI-VerifiedWeight Loss

Orlistat Side Effects

Complete guide to Orlistat side effects — what's common, what's serious, which body systems are affected, and when to see a doctor.

Body impact map

Common
Serious
4
Common effects
2
Serious effects
4
Body systems

Common Side Effects

Usually mild · often resolve on their own

These side effects may occur in some patients taking Orlistat. Most are mild and improve as your body adjusts. Tell your doctor if any persist or worsen.

Oily/fatty stools
Whole body
Gas
Stomach / GI
Urgent bowel movements
Stomach / GI
Oily spotting
Whole body

Serious Side Effects

Rare but urgent · seek immediate medical help

Stop taking Orlistat and seek immediate medical help if any of the following occur. Call 112 for emergencies.

Emergency · 112
Liver damage (rare)
Liver
Kidney stones (oxalate)
Kidney

Not a complete list. Report any unusual symptoms to your doctor immediately.

How to Minimize Side Effects

Simple steps that help

  • Take Orlistat exactly as prescribed by your doctor — never change the dose yourself.
  • Follow dosage timing instructions carefully (with food / empty stomach / at bedtime as directed).
  • Do not stop Orlistat suddenly without consulting your doctor — sudden discontinuation can be risky.
  • Report any new or unusual symptoms to your doctor promptly — early detection prevents complications.
  • Check drug interactions with GoDavaii AI before starting any new medicine, supplement, or even herbal remedy.
  • Avoid alcohol while on Orlistat unless your doctor has confirmed it is safe.
AI-Verified · Cross-checked against 40,000+ interaction database

Not medical advice

Individual responses to Orlistat vary — age, weight, existing conditions, and other medicines all matter. Always consult your doctor for personalized advice. For emergencies, call 112.

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