A Perth schoolboy remains critically ill in hospital, a week on from taking an ecstasy tablet.
The 15-year-old was left in a coma, attached to a life support system, after taking a drug with friends on Friday, October 28.
He is still in a serious but stable condition at Ninewells Hospital in Dundee, Police Scotland has confirmed.
Another 15-year-old boy who was hospitalised after taking an “unknown substance” on Sunday night has now been discharged and is recovering at home. It is believed the two cases are unconnected.
Chief Superintendent Paul Anderson said: “The dangers of taking drugs are real and clear for all to see.
“Quite simply, you can never be sure of what you are taking or how your body will react. It only takes one bad reaction to put your life in serious danger and it really is not worth the risk.”
He added: “We will continue to take action against those who supply illegal drugs in our communities and we will be working with partners in education and health to educate young people and the public about the risks involved.
“We do not want to see illegal drugs being dealt in our communities and I would urge anyone with information about drug dealing to contact us so we can take robust action.”
A 17-year-old has appeared at Perth Sheriff Court in connection with the October 28 incident. He faces charges of supplying class A drugs to the 15-year-old and three of his friends.
He made no plea during the brief, private hearing on Monday and was released on bail.
By the time the schoolboy, who cannot be named, reached Ninewells late on Friday night, he was unconscious and having serious trouble breathing.
Health chiefs in Scotland had previously warned about ecstasy tablets known as Purple Ninja Turtles and Red Bugatti Veyrons.
It followed the death of 16-year-old Shellie Callaghan, who fell seriously ill at her home in Midlothian.