Pigment gallstones usually not seen in:
Clofibrate therapy: Increased biliary secretion of cholesterol, leads to cholesterol gallstones. Pigment stones are more common in patients who have chronic hemolytic states), liver cirrhosis, Gilbe's syndrome, or cystic fibrosis. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 2618
Gilbe's syndrome
Alcoholic cirrhosis
Cystic fibrosis
Clofibrate therapy