Comparative Pharmacology
Head-to-head clinical analysis: ENULOSE versus LACTULOSE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ENULOSE versus LACTULOSE.
ENULOSE vs LACTULOSE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Lactulose is a synthetic disaccharide that is not absorbed from the gastrointestinal tract. It is metabolized by colonic bacteria to form low molecular weight organic acids, which lower the colonic pH and increase osmotic pressure, resulting in increased stool volume and laxative effect. In hepatic encephalopathy, the acidification of the colon inhibits the growth of ammonia-producing bacteria and promotes the conversion of ammonia to ammonium ion, which is trapped in the colon and excreted, thereby reducing systemic ammonia levels.
Lactulose is a non-absorbable disaccharide that is metabolized by colonic bacteria to short-chain fatty acids, primarily lactic acid and acetic acid, resulting in an osmotic effect that increases stool water content and softens stools. In hepatic encephalopathy, lactulose acidifies the colonic lumen, converting NH3 to NH4+, which is poorly absorbed, and reduces systemic ammonia levels.
15-45 mL orally once daily, titrated to produce 2-3 soft stools per day. Maximum 60 mL per day.
Constipation: 15-30 mL (10-20 g) orally once daily, increased to 45-60 mL (30-40 g) daily if needed. Hepatic encephalopathy: 30-45 mL (20-30 g) orally 3-4 times daily; titrate to produce 2-3 soft stools daily.
None Documented
Clinical Note
moderateL-Glutamine + Lactulose
"The therapeutic efficacy of Lactulose can be decreased when used in combination with L-Glutamine."
None Documented
Terminal elimination half-life is 2.1 hours in normal renal function; prolonged to up to 6 hours in renal impairment.
1-2 hours (terminal elimination half-life for lactulose). However, its clinical effect is not dependent on systemic half-life; the drug acts locally in the colon.
Primarily renal (95% unchanged by glomerular filtration); biliary/fecal less than 5%.
Primarily fecal (unaltered, >90%). Minimal renal excretion (<5% as metabolites). Very small amount (approximately 3%) excreted in urine as unchanged drug.
Category C
Category C
Laxative
Laxative