Cholestyramine (Questran®, Questran Light®, Cholybar®) is a bile acid sequestrant, which binds bile in the gastrointestinal tract to prevent its reabsorption. It increases removal of bile acids from body by forming insoluble complexes in intestine, which are then excreted in feces. When bile acids are excreted, plasma cholesterol is converted to bile acid to normalize bile acid levels.