Usual Adult Dose for Constipation -- Chronic:
15 mL orally once a day.
Usual Adult Dose for Constipation -- Acute:
Initial dose:  15 mL orally once a day.  Therapy should be continued until normal bowel function resumes.
Usual Adult Dose for Hepatic Encephalopathy:
Initial dose:  30 mL orally 3 times a day or 300 mL in 700 mL water or normal saline as an enema retained for 30 to 60 minutes every 4 to 6 hours.Maintenance dose:  30 to 45 mL orally 3 times a day.
Usual Pediatric Dose for Hepatic Encephalopathy:
Infants: 1.7 to 6.7 g/day (2.5 to 10 mL) orally daily divided in 3 to 4 doses.  Adjust dosage to produce 2 to 3 soft stools per day.Children: 26.7 to 60 g/day (40 to 90 mL) orally daily divided in 3 to 4 doses.  Adjust dosage to produce 2 to 3 soft stools per day.
Usual Pediatric Dose for Constipation -- Chronic:
Children: 0.7 to 2 g/kg/day (1 to 3 mL/kg/day) orally in divided doses daily; generally recommended not to exceed the adult maximum of 40 g/day (60 mL/day).
 Detailed Lactulose dosage information
