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Clubbers may be switching from ecstasy and cocaine to the powerful legal high mephedrone, according to new research.

Little is known about the powder, which has gone from nowhere to fourth position in a study of clubbers' drug taking habits.

'Widely used' on club scene says survey

What is mephedrone?

What else is it known as?

Is it anything to do with another drug called methadone?

What are the intended effects of taking it?

And the side effects?

How safe is it? Any long term dangers?

How is it sold?

What's the legal situation?

Is it going to be made illegal here any time soon?