Dangers of taking the drug

Ecstasy is a powerful and potentially fatal drug which has claimed scores of young lives over the last decade - often in the most horrific manner.

Its effects can cause potentially fatal dehydration - or make users drink more than they need and lead to lethal swelling of the brain.

It is a potent enough drug for adults but its effects on an immature nervous system would be even more dangerous. Another potential problem is the sometimes lethal substances mixed with the drug in order to manufacture more tablets.

Extra-strong versions can also lead to overdosing and muliple organ failure.

Ecstasy, or methyl-enedioxymethylamphetamine - MDMA - was first developed in prewar Germany. Teenager Leah Betts remains an enduring image of its fatal effects. She died in 1995 after taking the drug at her birthday party.

Because ecstasy lowers inhibitions and increases feelings of well-being, it is difficult to recognise thirst and exhaustion. Lack of hydration and constant dancing causes body temperature to rise.

Eventually the body stops sweating to curb fluid loss, which leads to a build-up of water. This causes brain swelling and damages the part of the brain which controls the heart and breathing.

This can lead to respiratory arrest, heart attack, organ failure and eventual death. Recent research found that even occasional use can cause long-term memory problems and mental illness.