List of products in the National Drug Code with proprietary name . This medication is used alone or in combination treatment for a certain liver disease (primary biliary cholangitis-PBC). This disease slowly destroys the bile ducts in the liver. When bile ducts are damaged, harmful substances can build up in bile and scar the liver. Obeticholic acid works by causing your liver to make less bile, and by helping bile flow out of the liver. Obeticholic acid may help slow worsening of primary biliary cholangitis and decrease symptoms such as tiredness, itchy skin, abdominal pain, and dry eyes and mouth.