lactulose

noun

lac·​tu·​lose ˈlak-t(y)u̇-ˌlōs  -ˌlōz 

: a synthetic disaccharide C₁₂H₂₂O₁₁ used as a laxative for chronic constipation and as an acidifier to reduce blood ammonia levels causing neurological symptoms in advanced liver disease

Note: Lactulose is used in solution for oral or rectal administration.