Biliary lipid composition during treatment with different hypolipidaemic drugs

Area of Science:

• Hepatology
• Gastroenterology
• Pharmacology

Background:

• Hyperlipoproteinaemia is associated with altered bile composition.
• Hypolipidaemic drugs are widely used, but their effects on bile lithogenicity require clarification.

Purpose of the Study:

• To investigate the lithogenic potential of commonly prescribed hypolipidaemic drugs.
• To assess the impact of nicotinic acid, cholestyramine, and clofibrate on gallbladder bile composition.

Main Methods:

• Gallbladder bile was collected from hyperlipoproteinaemia patients before and during drug treatment.
• Patients received nicotinic acid, cholestyramine, clofibrate, or a combination for at least 6 weeks under standardized diets.

Main Results:

• Nicotinic acid and clofibrate significantly increased biliary cholesterol concentration.
• Cholestyramine decreased relative cholesterol concentration in bile.
• Combination therapy with cholestyramine and clofibrate normalized bile saturation in most patients.

Conclusions:

• Nicotinic acid and clofibrate are likely associated with an increased risk of cholesterol gallstone formation.
• Cholestyramine may mitigate the lithogenic effects of clofibrate, particularly when hypotriglyceridemic effects are also desired.