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Hypersensitivity to the active substance or to any of the ingredients.
Galactosemia.
Gastrointestinal obstruction, digestive perforation or risk of digestive perforation.
Lactulose (Duphalac) solution for bowel cleansing should not be administered to unconscious patients or those with impaired consciousness and patients prone to aspiration or regurgitation, general weakness, with severe dehydration or impaired swallowing reflex.
