A YOUNG runner who collapsed and died during the London marathon had "significant" levels of an amphetamine-like stimulant in her system, an inquest has heard.
Claire Squires, 30, suffered a cardiac arrest outside Buckingham Palace, where she was treated in a medical tent before being rushed to hospital.
Sanjay Sharma, medical director of the marathon and professor of cardiology at St George's Hospital, said the drug, DMAA, may have contributed to the excessive level of blood coming from her lungs, which was "unusual" in such a young person.
The inquest heard that the drug is not illegal although may be banned in competitive sport.
Prof Sharma said the high potassium levels detected, her very stiff body and evidence of blood clotting, would "certainly fit with pure amphetamine use".
Victoria Ward, Telegraph.co.uk