This is what I found under causes of cholestasis......
Within the Liver: Causes include acute hepatitis, alcoholic liver disease, primary biliary cirrhosis with inflammation and scarring of the bile ducts, cirrhosis due to viral hepatitis B or C (also with inflammation and scarring of the bile ducts), drugs, hormonal effects on bile flow during pregnancy (a condition called cholestasis of pregnancy-see see Pregnancy Complicated by Disease: Cholestasis of pregnancy), and cancer that has spread to the liver.