Comparative Pharmacology
Head-to-head clinical analysis: LACTULOSE versus TRILYTE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: LACTULOSE versus TRILYTE.
LACTULOSE vs TRILYTE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
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.
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.
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.
Adults: 1 liter (L) orally every 10-15 minutes until 4 L total consumed; complete ingestion within 4 hours.
None Documented
None Documented
Clinical Note
moderateL-Glutamine + Lactulose
"The therapeutic efficacy of Lactulose can be decreased when used in combination with L-Glutamine."
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.
Not applicable; non-absorbed, acts locally in GI tract
Primarily fecal (unaltered, >90%). Minimal renal excretion (<5% as metabolites). Very small amount (approximately 3%) excreted in urine as unchanged drug.
Renal excretion of intact electrolyte ions; negligible drug excretion
Category C
Category C
Laxative
Laxative