“Ingestion of lactulose did not … conditions, but during administration of ampicillin, lactulose caused increases in stool weight (p less than 0.02) and frequency (p less than 0.01), in the … than 0.001), and in the excretion of galactose and fructose in stool samples collected from 2 volunteers.”
“Mouth-to-cecum transit of the lactulose drink was prolonged during ampicillin ingestion (p less than 0.01) but there was no significant change in the whole gut transit time.”