Contraindications and Precautions for Orlistat Use

Introduction to Orlistat Contraindications

The American Gastroenterological Association suggests that orlistat should not be used in patients with cholelithiasis due to the risk of worsening biliary disease and causing complications related to gallstones 1
Orlistat is specifically contraindicated in patients with cholelithiasis because it interferes with biliary function, as it is an intestinal lipase inhibitor that reduces fat absorption, which can alter bile composition and worsen the condition of cholelithiasis 2

Orlistat works by inhibiting gastric and pancreatic lipases, blocking approximately 30% of ingested fat absorption, which can affect patients with cholelithiasis 1

For obese patients with cholelithiasis who need weight management, it is recommended to consider other weight loss medications that do not affect biliary function, supervised dietary modifications, structured physical activity programs, and in selected cases, consider bariatric surgery after resolving cholelithiasis 1

If orlistat is considered for use in a patient with a history of biliary problems, it is recommended to consult with a gastroenterology specialist before initiating treatment, closely monitor liver function and symptoms related to the gallbladder, and immediately suspend the medication if there are any signs of worsening biliary condition 2