Britain’s teenagers are more likely to take drugs than any other teenagers in Europe, a shocking new report has revealed. The report claims as many as one in twenty schoolchildren have tried cocaine – that’s around 200,000 teenagers. So what drugs might your kids be exposed to? What are their effects and how do you spot the signs your teenager is using?

What: Cocaine powder, freebase and crack are all forms of cocaine. They are stimulants with powerful, but short-lived, effects. Appearance: ‘Coke’, or cocaine powder, is a white powder that's usually divided into lines on a smooth surface and snorted up the nose with a rolled up note or straw. Slang: Coke, Charlie, C, white, Percy, snow, toot The effects: People taking it feel wide-awake, confident and on top of their game. Cost: A gram of coke powder generally costs between £30 and £60 Chances to getting hooked: It can be difficult to resist the craving and strong psychological dependence due to changes in the brain.