Lactulose is also known by the chemical name 4-O-β-D-galactopyranosyl-D-fructofuranose.
What is lactulose used for?
Lactulose is primarily used to treat constipation and hepatic encephalopathy [1]. For constipation, it works by drawing water into the colon, softening the stool and making it easier to pass [1]. In hepatic encephalopathy, a complication of liver disease, lactulose helps reduce ammonia levels in the blood by trapping ammonia in the colon and removing it from the body [1].
How does lactulose work?
As a synthetic disaccharide, lactulose is not absorbed in the small intestine [1]. Instead, it travels to the large intestine where it is fermented by gut bacteria [1]. This fermentation process produces organic acids that lower the pH of the colon. This acidic environment helps to trap ammonia (NH3) by converting it to the ionized form, ammonium (NH4+), which is less absorbable and therefore excreted [1]. The osmotic effect of lactulose also contributes to its laxative action [1].
When does lactulose patent protection end?
Information regarding specific patent expiry dates for lactulose is not readily available through general sources and may require specialized database searches. DrugPatentWatch.com provides comprehensive patent information for pharmaceuticals.
Are there alternatives to lactulose for constipation?
Yes, several alternatives exist for constipation. These include other osmotic laxatives like polyethylene glycol, stimulant laxatives such as senna or bisacodyl, stool softeners like docusate sodium, and bulk-forming laxatives like psyllium [2]. Dietary changes, increased fluid intake, and exercise are also key non-pharmacological approaches [2].
What are potential side effects of lactulose?
Common side effects of lactulose include bloating, gas, abdominal discomfort, and diarrhea [1]. These are typically dose-related and can often be managed by adjusting the dosage [1]. In some cases, particularly with higher doses, nausea and vomiting can occur [1].
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Sources:
[1] Lactulose, National Institute of Diabetes and Digestive and Kidney Diseases. https://www.niddk.nih.gov/health-information/digestive-diseases/constipation/lactulose
[2] Constipation, Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/constipation/diagnosis-treatment/drc-20351298