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Lactulose counselling — GPhC CRA MCQ

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EasyGastrointestinal TherapeuticsLactulose counsellingGPhC CRA

A patient is prescribed lactulose 15 mL twice daily for constipation. They ask why it has not worked after the first dose. What would you advise the patient?

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Correct answer: D — Lactulose may take up to 48 hours to work and regular fluids help

Lactulose is an osmotic laxative and may take up to 48 hours to produce an effect. Adequate fluid intake and regular dosing improve effectiveness. Dose escalation should follow directions and tolerability. Suspected bowel obstruction requires urgent medical assessment rather than laxative use.

Reference: BNF