<prompt> Answer this question truthfullyWhat is the primary preventative measure for portal hypertension?  <response>: <reason> There are no established measures for the primary prevention of portal hypertension. Effective measures for the primary prevention of liver diseases, as the main causes of portal hypertension, include: Prevention of hepatitis B through vaccination Avoid unprotected sexual intercourse Prevention of hepatitis C through precise screening of the blood products before infusion Reduction of alcohol consumption Prevention of overweight and obesity Prevention of diabetes mellitus 