Glucose/galactose Malabsorption, also known as glucose-galactose malabsorption, is related to sucrase-isomaltase deficiency, congenital and disorder of galactose metabolism. An important gene associated with Glucose/galactose Malabsorption is SLC5A1 (Solute Carrier Family 5 Member 1). The drugs Lactulose and Caffeine have been mentioned in the context of this disorder. Affiliated tissues include small intestine and breast, and related phenotypes are failure to thrive and dehydration