Comparative Pharmacology
Head-to-head clinical analysis: CHOLAC versus TRILYTE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CHOLAC versus TRILYTE.
CHOLAC vs TRILYTE
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.
TRILYTE (polyethylene glycol 3350, sodium sulfate, sodium chloride, potassium chloride, sodium ascorbate, ascorbic acid) is an osmotic laxative. The active components induce diarrhea by osmotically drawing water into the gastrointestinal lumen, thereby increasing stool volume and stimulating peristalsis. Sodium ascorbate and ascorbic acid enhance the osmotic effect.
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.
Adults: 1 liter (L) orally every 10-15 minutes until 4 L total consumed; complete ingestion within 4 hours.
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.
Not applicable; non-absorbed, acts locally in GI tract
Primarily fecal (biliary excretion of unchanged drug and metabolites); minimal renal excretion (<5%).
Renal excretion of intact electrolyte ions; negligible drug excretion
Category C
Category C
Laxative
Laxative