RT Journal Article SR Electronic T1 How to interpret urine toxicology tests JF Archives of disease in childhood - Education & practice edition JO Arch Dis Child Educ Pract Ed FD BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health SP 84 OP 88 DO 10.1136/archdischild-2018-316139 VO 105 IS 2 A1 Emma M Dyer A1 Sormeh Salehian YR 2020 UL http://ep.bmj.com/content/105/2/84.abstract AB A 13-year-old girl presents to the emergency department for the second time with an unresponsive episode. She has a GCS (Glasgow Coma Scale) score of 11 on arrival and all other observations are normal. The story is unclear, but there are ongoing safeguarding concerns and the family are known to social services. All investigations are normal. After a period of observation on the ward, her GCS returns to normal and she appears well. Both on the first presentation and this presentation ingestion of a toxin was suspected. However, this was denied by the patient and urine toxicology screen was negative. Does this rule out toxin ingestion? Will this change your management?