<prompt> Drug useful in hepatic encephalopathy is:Magnesium sulphateLactuloseBisacodylBiphosphonates  <response>: Ans. B LactuloseRef: KDT 8the p725Lactulose is a laxative that acts by conversion to short chain fatty acids in the colon.These fatty acids result in decrease in pH of intestinal juice.At low pH, ammonia becomes ionized NH4 and thus cannot be absorbed. 