Constipation Adult 15-30 mL daily. Maintenance: 10-15 mL daily.
Childn 6-12 yr 20 mL daily,
1-5 yr 10 mL daily,
<1 yr 5 mL daily.
Hepatic encephalopathy 30-50 mL tds, adjusted to produce 2-3 soft stools daily.
Acute cases Retention enema is given in proportion of lactulose 300 mL to water 700 mL, retained for 30-60 min & repeated 4-6 hrly until patient is able to take oral medication.