Comparative Pharmacology
Head-to-head clinical analysis: CHOLAC versus LACTULOSE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CHOLAC versus LACTULOSE.
CHOLAC 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 in the small intestine. It is metabolized by colonic bacteria to short-chain fatty acids, primarily lactic acid and acetic acid, which lower the colonic pH. This acidification traps ammonia (NH3) as ammonium (NH4+) in the gut lumen, reducing serum ammonia levels. Additionally, the osmotic effect of lactulose draws water into the colon, producing a laxative effect.
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.
15-30 mL (10-20 g lactulose) orally once daily, titrated to produce 2-3 soft stools per day; maximum dose 60 mL/day. For hepatic encephalopathy: 30-45 mL (20-30 g) orally 3-4 times daily, titrated to 2-3 soft stools 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.
Clinical Note
moderateL-Glutamine + Lactulose
"The therapeutic efficacy of Lactulose can be decreased when used in combination with L-Glutamine."
None Documented
None Documented
0.5-1.5 hours for lactulose; active metabolites (e.g., acetic acid) have negligible systemic half-life due to rapid local metabolism.
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 fecal (biliary excretion of unchanged drug and metabolites); minimal renal excretion (<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