4x4 Reports: Wasted was on BBC One on Monday 19 August at 1930 BST.

As drug use by young people rockets, four reports examine the heartbreaking consequences.

Andy is a lad who loves his Mum, loves his bikes, and his music.

But Andy has been hooked on heroin for two years. He is just 14.

4x4 Reports spent three days living with Andy and his Mum to find out what it's like to be a schoolboy smackhead.

He wants to give up. He needs to give up. But what does his Mum do when she meets him high on drugs?

Shattered lives

Sally Magnusson meets a mother whose 17-year-old daughter took a heroin overdose in a toilet block while pregnant.

Amy had fallen in love with a user and developed an addiction which wrecked the lives of three generations.

Her baby girl was starved of oxygen in the womb, delivered by emergency caesarean and died a week later.

Now aged 19, Amy is likely to remain in a coma until her death.

She will never be able to explain to her mother how she came to take heroin that day.

Experimenting with pot

"Somebody stood up and announced to the rest of the world that Brixton was the place to come and deal drugs."

That is how residents in the London Borough of Lambeth feel about an experiment to decriminalise cannabis which was conducted in their area over the last year.

Instead of being arrested, anyone caught with a small amount of cannabis received a verbal warning. The idea was to free the police up to tackle hard drugs and other crime.

But local people say it has been a dismal failure, sending out a misleading message to kids who want to smoke dope and bringing drug dealers out in force on their streets.

David Akinsanya has taken a trip to the area where he found people confused about the law and angry that their concerns have been ignored.

Zero tolerance

Tom Mangold reports on Sweden's zero tolerance of snorting, smoking or shooting.

Here, the law of the land states anyone can be stopped and drug tested.

Only 9% of Swedish school children have tried drugs compared to 35% in the UK.

But severe drug addiction in the country is on the up.

Does locking up users in treatment centres guarantee they will kick the habit?