Answer
No. It does not reduce calorie or nutrient absorption. Fluid loss from diarrhoea can misleadingly appear as weight loss and may be harmful.
Sources for this answer
- Dulcolax Twelve Plus 5 mg Gastro-resistant Tablets — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.