People who want to get high and the authorities often engage in a game of cat and mouse with new drugs emerging as old ones are clamped down on. The latest 'legal high' to appear on the U.K. club scene is mephedrone which is usually snorted, although it can also be taken in pill form, mixed with drinks or injected. The drug is sold on the Internet as 'plant food' (it won't improve your geraniums) and is said to produce an effect like a cross between cocaine and ecstasy. In a poll for the dance music magazine Mixmag one in three readers said they had taken the drug. The poll was carried out on behalf of the National Addictions Centre at King's College London and found that 51% of users suffered from headaches, 43% from heart palpitations, 29% from nausea and 15% from cold or blue fingers.