Three men were hospitalised last week after they took a legal high off someone on the street in Peckham.
Police were called to reports of a man fitting in Staffordshire Street at 9.40pm on Thursday night.
When they arrived on scene the victim, believed to be in his twenties, told officers he had taken a drug known as ‘spice’ after being offered it for free.
The London Ambulance Service took the man to a south London hospital. He was later discharged.
Ten minutes later, police were called to Peckham High Street where a second man had similar symptoms. He too is believed to have taken the drug and was also taken to hospital and later discharged himself.
A third man, who was taken to hospital with the same symptoms just before 7pm was in a critical but stable condition. Police would not later comment on his condition.
The police confirmed that no offences were committed and their enquiries had been completed with no arrests.