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Lactulose, disaccharides and colonic flora. Clinical consequences
1Department of Medicine CA, Rigshospitalet, University of Copenhagen, Denmark.
Drugs
|June 1, 1997
Summary
Lactulose effectively treats constipation and hepatic encephalopathy by acting in the colon. It is fermented by gut bacteria, producing beneficial short-chain fatty acids and gases.
Area of Science:
- Pharmacology
- Gastroenterology
Background:
- Lactulose is a widely used therapeutic agent for constipation and hepatic encephalopathy.
- Its efficacy and safety profile are well-established.
- Understanding its mechanism of action is crucial for optimizing treatment.
Purpose of the Study:
- To review the basic clinical pharmacology of lactulose.
- To discuss the mechanisms by which lactulose exerts therapeutic effects in constipation and hepatic encephalopathy.
Main Methods:
- Review of existing literature on lactulose pharmacology.
- Analysis of its pharmacokinetic and pharmacodynamic properties.
- Focus on its non-absorptive nature and colonic fermentation.
Main Results:
- Lactulose is a synthetic, non-hydrolyzable disaccharide.
- It is not absorbed in the small intestine, reaching the colon intact.
- Colonic fermentation yields short-chain fatty acids and gases, influencing gut environment.
Conclusions:
- Lactulose's therapeutic actions stem from its colonic metabolism.
- The production of SCFAs and gases by gut microbiota is key to its benefits.
- Further understanding of these mechanisms can refine clinical applications.