Laxative Screen
Clinical Biochemistry
Sample and container requirements
Plain Spot Urine
Minimum volume required
20 mL urine
Special requirements
Ideally collect 3 samples on consecutive days during symptoms.
Patient preparation
None
Sample viability
Turnaround time
21 days
Reference range
Please refer to report for reference ranges.
Clinical guidance
Please follow the link below to the referral laboratory website for more information: https://www.northerncarealliance.nhs.uk/our-services/pathology-nca-wwl/navigate/161909/11662#ccm-block-document-library-161909
Notes
Sent to Salford Royal Hospitals Drugs tested: Bisacodyl (Dulcolax), Danthron, Rhein (Senokot), Phenolpthalein.
Images to go here
This information was last updated on 19 August 2026